[fix] Remove copied scripts before git checkout to avoid conflicts

- Clean up scripts/snapshot-api.js and scripts/compare-api-snapshots.js before checkout
- Fixes untracked working tree files conflict when returning to current version

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

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

.github/workflows/release-api-changelogs.yaml

@@ -129,6 +129,9 @@ jobs:
       - name: Return to current version
         if: steps.previous_version.outputs.tag != ''
         run: |
+          # Remove copied scripts to avoid conflicts
+          rm -f scripts/snapshot-api.js scripts/compare-api-snapshots.js
+
           git checkout -
           git stash pop || true