fix: add permissions to release job in auto-release workflow (#504)

## Summary
- Adds `contents: write` and `pull-requests: write` permissions to the
`release` job in the auto-release workflow
- This ensures the reusable `build-and-publish` workflow has the
necessary permissions to create releases and interact with pull requests

## Test plan
- [ ] Verify the auto-release workflow runs successfully on the next
version bump commit
- [ ] Confirm the release job can create GitHub releases and update pull
requests as expected

## Changelog
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🤖 Generated with [Claude Code](https://claude.com/claude-code) (100%
1-shotted by claude)

Co-authored-by: Claude <noreply@anthropic.com>

Author: ashwin-ant

.github/workflows/auto-release.yml

@@ -45,6 +45,9 @@ jobs:
 
   release:
     needs: check-trigger
+    permissions:
+      contents: write
+      pull-requests: write
     uses: ./.github/workflows/build-and-publish.yml
     with:
       version: ${{ needs.check-trigger.outputs.version }}