fix: resolve YAML syntax error in release workflow

- Fix GitHub Actions expression in shell script by using env variable
- Prevents YAML parsing error on line 452
- Ensures workflow can execute properly

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.github/workflows/release.yml

@@ -441,6 +441,8 @@ jobs:
           fi
       
       - name: Commit documentation updates
+        env:
+          VERSION: ${{ needs.detect-version-change.outputs.new-version }}
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
@@ -449,7 +451,7 @@ jobs:
             echo "No documentation changes to commit"
           else
             git add README.md
-            git commit -m "docs: update version badges to v${{ needs.detect-version-change.outputs.new-version }}"
+            git commit -m "docs: update version badges to v${VERSION}"
             git push
             echo "✅ Committed documentation updates"
           fi