Skip dev build on production release commits

Add [skip ci] to the release commit message so pushing
it to main doesn't trigger the release-dev workflow.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: brendan-kellam

.github/workflows/release-prod.yml

@@ -134,7 +134,7 @@ jobs:
       - name: Commit changes
         run: |
           git add CHANGELOG.md packages/shared/src/version.ts
-          git commit -m "Release v$VERSION"
+          git commit -m "[skip ci] Release v$VERSION"
 
       - name: Push to temporary branch
         id: push_temp_branch