Update Vault CLI download link to use architecture (#514)

## Description

The download command was downloading only the amd64 version,

## Type of Change

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

## Module Information

<!-- Delete this section if not applicable -->

**Path:** `registry/[namespace]/modules/[module-name]`  
**New version:** `v1.0.0`  
**Breaking change:** [ ] Yes [ ] No

## Template Information

<!-- Delete this section if not applicable -->

**Path:** `registry/[namespace]/templates/[template-name]`

## Testing & Validation

- [ ] Tests pass (`bun test`)
- [ ] Code formatted (`bun fmt`)
- [ ] Changes tested locally

## Related Issues

<!-- Link related issues or write "None" if not applicable -->

registry/coder/modules/vault-token/README.md

@@ -19,7 +19,7 @@ variable "vault_token" {
 
 module "vault" {
   source          = "registry.coder.com/coder/vault-token/coder"
-  version         = "1.2.1"
+  version         = "1.2.2"
   agent_id        = coder_agent.example.id
   vault_token     = var.token # optional
   vault_addr      = "https://vault.example.com"
@@ -73,7 +73,7 @@ variable "vault_token" {
 
 module "vault" {
   source            = "registry.coder.com/coder/vault-token/coder"
-  version           = "1.2.1"
+  version           = "1.2.2"
   agent_id          = coder_agent.example.id
   vault_addr        = "https://vault.example.com"
   vault_token       = var.token

registry/coder/modules/vault-token/run.sh

@@ -68,7 +68,7 @@ install() {
     else
       printf "Upgrading Vault CLI from version %s to %s ...\n\n" "$${CURRENT_VERSION}" "${INSTALL_VERSION}"
     fi
-    fetch vault.zip "https://releases.hashicorp.com/vault/$${INSTALL_VERSION}/vault_$${INSTALL_VERSION}_linux_amd64.zip"
+    fetch vault.zip "https://releases.hashicorp.com/vault/$${INSTALL_VERSION}/vault_$${INSTALL_VERSION}_linux_$${ARCH}.zip"
     if [ $? -ne 0 ]; then
       printf "Failed to download Vault.\n"
       return 1