fix(086): add workflow_dispatch trigger to release-please

Merging bot-authored release PRs doesn't trigger push workflows
due to GitHub Actions loop prevention. Adding workflow_dispatch
enables manual triggering as a fallback.

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

Author: davidmatousek

.github/workflows/release-please.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+  workflow_dispatch:
 
 permissions:
   contents: write