Repair pr-checker.yml parsing and update deprecated checkout action#3

achanhalt with Copilot wants to merge 7 commits into

mainLucassChong/LibraryMan-API:mainfrom

copilot/update-workflow-for-pr-validationLucassChong/LibraryMan-API:copilot/update-workflow-for-pr-validationCopy head branch name to clipboard