Add contents write permission to release workflow

Fix GitHub Actions permissions error when creating releases.
The GITHUB_TOKEN needs explicit write permission for contents to create releases.

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: scriptacus

.github/workflows/release.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   build-and-release:
     runs-on: windows-latest
+    permissions:
+      contents: write
 
     steps:
       - name: Checkout code