CI: Pin GitHub Actions and fix zizmor high-severity findings (#667)

## Description

This PR fixes zizmor --min-severity high findings in our GitHub Actions
workflows by:
- Pinning all uses: references to immutable commit SHAs (replaces
floating tags like @v6 / @main).
- Pinning internal Terraform setup action usage
(coder/coder/.github/actions/setup-tf@main) to a fixed ref/commit.
- Pinning crate-ci/typos to a commit SHA.
- Removing GitHub expression template expansion inside a run: block in
version-bump.yaml (prevents template injection flagged by zizmor).


## Type of Change

- [ ] New module
- [ ] New template
- [ ] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [x] Other

## Module Information

N/A

## Template Information

N/A

## Testing & Validation

- [ ] Tests pass (`bun test`)
- [ ] Code formatted (`bun fmt`)
- [x] Changes tested locally - zizmor .github/workflows/* --min-severity
high

## Related Issues

- coder/registry#642
- https://github.com/coder/registry/pull/662

.github/workflows/check_registry_site_health.yaml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Run check.sh
         run: |

.github/workflows/ci.yaml

@@ -12,9 +12,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Detect changed files
-        uses: dorny/paths-filter@v3
+        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3
         id: filter
         with:
           list-files: shell
@@ -37,9 +37,9 @@ jobs:
             all:
               - '**'
       - name: Set up Terraform
-        uses: coder/coder/.github/actions/setup-tf@main
+        uses: coder/coder/.github/actions/setup-tf@59cdd7e21f4d7da12567c0c29964d298fbf38f27 # v2.29.1
       - name: Set up Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@3d267786b128fe76c2f16a390aa2448b815359f3 # v2
         with:
           # We're using the latest version of Bun for now, but it might be worth
           # reconsidering. They've pushed breaking changes in patch releases
@@ -80,20 +80,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@3d267786b128fe76c2f16a390aa2448b815359f3 # v2
         with:
           bun-version: latest
       # Need Terraform for its formatter
       - name: Install Terraform
-        uses: coder/coder/.github/actions/setup-tf@main
+        uses: coder/coder/.github/actions/setup-tf@59cdd7e21f4d7da12567c0c29964d298fbf38f27 # v2.29.1
       - name: Install dependencies
         run: bun install
       - name: Validate formatting
         run: bun fmt:ci
       - name: Check for typos
-        uses: crate-ci/typos@v1.42.0
+        uses: crate-ci/typos@bb4666ad77b539a6b4ce4eda7ebb6de553704021 # v1.42.0
         with:
           config: .github/typos.toml
   validate-readme-files:
@@ -104,9 +104,9 @@ jobs:
     needs: validate-style
     steps:
       - name: Check out code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Go
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6
         with:
           go-version: "1.24.0"
       - name: Validate contributors

.github/workflows/deploy-registry.yaml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Authenticate with Google Cloud
         uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093
         with:

.github/workflows/golangci-lint.yml

@@ -14,11 +14,11 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-go@v6
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6
         with:
           go-version: stable
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v9
+        uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9
         with:
           version: v2.1

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           fetch-depth: 0
           persist-credentials: false

.github/workflows/version-bump.yaml

@@ -20,26 +20,28 @@ jobs:
       issues: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           fetch-depth: 0
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@3d267786b128fe76c2f16a390aa2448b815359f3 # v2
         with:
           bun-version: latest
 
       - name: Set up Terraform
-        uses: coder/coder/.github/actions/setup-tf@main
+        uses: coder/coder/.github/actions/setup-tf@59cdd7e21f4d7da12567c0c29964d298fbf38f27 # v2.29.1
 
       - name: Install dependencies
         run: bun install
 
       - name: Extract bump type from label
+        env:
+          LABEL_NAME: ${{ github.event.label.name }}
         id: bump-type
         run: |
-          case "${{ github.event.label.name }}" in
+          case "$LABEL_NAME" in in
             "version:patch")
               echo "type=patch" >> $GITHUB_OUTPUT
               ;;
@@ -50,7 +52,7 @@ jobs:
               echo "type=major" >> $GITHUB_OUTPUT
               ;;
             *)
-              echo "Invalid version label: ${{ github.event.label.name }}"
+              echo "Invalid version label: ${LABEL_NAME}"
               exit 1
               ;;
           esac
@@ -60,7 +62,7 @@ jobs:
 
       - name: Comment on PR - Version bump required
         if: failure()
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |