ci(release): Allow isolated Homebrew tap updates on workflow_dispatch

Enable update_homebrew_tap for manual test runs so Homebrew automation can
be validated in isolation without tag releases.

The workflow_dispatch path still skips npm publish and GitHub release
creation because those steps remain push-only.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: cameroncooke

.github/workflows/release.yml

@@ -341,8 +341,8 @@ jobs:
             --clobber
 
   update_homebrew_tap:
-    if: github.event_name == 'push'
-    needs: [release, publish_portable_assets]
+    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    needs: [release, build_and_package_macos]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code