Fix PR comments on forked repositories by using pull_request_target and proper PR number extraction#128

Copilot wants to merge 3 commits intomaincommit-check/commit-check-action:mainfrom

copilot/fix-58e2f213-6f3b-492c-8b06-7e433b9a715bcommit-check/commit-check-action:copilot/fix-58e2f213-6f3b-492c-8b06-7e433b9a715bCopy head branch name to clipboard