fix: add .sync-upstream-review.json to .gitignore

Author: mceachen

.gitignore

@@ -88,6 +88,7 @@ packages/better-sqlite3-compat/temp/
 # Sync cache files
 .sync-cache.json
 .sync-tests-cache.json
+.sync-upstream-review.json
 
 # Synced Node.js test files (auto-generated by npm run sync:tests)
 # test/upstream/ contains unmodified Node.js originals (reference only)