Allow manual trigger of release workflow

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: shmuel hizmi

.github/workflows/release.yml

@@ -3,6 +3,7 @@ name: Release
 on:
   push:
     branches: [master]
+  workflow_dispatch:
 
 concurrency:
   group: release