ci(test-homebrew-build): validate hookdeck-beta.rb instead of hookdeck.rb

The GoReleaser brews block now produces `hookdeck-beta.rb` only (the stable
`hookdeck` formula lives in homebrew-core). The test-homebrew-build CI was
still validating `dist/homebrew/Formula/hookdeck.rb`, which no longer exists.

Updates:
- `test-scripts/test-homebrew-build.sh`: validate_formula now reads
  `hookdeck-beta.rb`; the install-test path (gated by `--install` flag,
  workflow_dispatch only) targets the `hookdeck-beta` formula name.
- `.github/workflows/test-homebrew-build.yml`: upload artifact path
  updated to `hookdeck-beta.rb`.

Verified locally: `./test-scripts/test-homebrew-build.sh` exits 0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: leggetter

.github/workflows/test-homebrew-build.yml

@@ -53,5 +53,5 @@ jobs:
         with:
           name: homebrew-files
           path: |
-            dist/homebrew/Formula/hookdeck.rb
+            dist/homebrew/Formula/hookdeck-beta.rb
           retention-days: 7

test-scripts/test-homebrew-build.sh

@@ -170,9 +170,11 @@ run_goreleaser_build() {
 
 # Validate Homebrew formula file
 validate_formula() {
-    echo_section "Validating Formula (dist/homebrew/Formula/hookdeck.rb)"
-    
-    local formula_file="dist/homebrew/Formula/hookdeck.rb"
+    echo_section "Validating Formula (dist/homebrew/Formula/hookdeck-beta.rb)"
+
+    # Stable releases of `hookdeck` now go to homebrew-core; the third-party
+    # tap publishes only `hookdeck-beta` on pre-release tags.
+    local formula_file="dist/homebrew/Formula/hookdeck-beta.rb"
 
     if [ ! -f "$formula_file" ]; then
         echo_error "Formula file not found at $formula_file"
@@ -298,7 +300,7 @@ setup_local_tap() {
 
     # Patch formula to use local file:// URLs for testing
     echo_info "Patching formula to use local file URLs for testing..."
-    local formula_file="$LOCAL_TAP_PATH/Formula/hookdeck.rb"
+    local formula_file="$LOCAL_TAP_PATH/Formula/hookdeck-beta.rb"
     local current_dir="$(pwd)"
 
     # Replace GitHub URLs with local file:// URLs
@@ -320,8 +322,8 @@ setup_local_tap() {
 test_formula_installation() {
     echo_section "Testing Formula Installation"
 
-    local tap_name="hookdeck-test/hookdeck-test/hookdeck"
-    
+    local tap_name="hookdeck-test/hookdeck-test/hookdeck-beta"
+
     echo_info "Installing formula: brew install $tap_name"
     if brew install "$tap_name"; then
         echo_success "Formula installed successfully"