security: document intentional absence of PR head ref in pull_request_target checkouts#855

kmarekspartz wants to merge 2 commits into

inkeep:maininkeep/open-knowledge:mainfrom

kmarekspartz:copilot/should-workflows-run-on-forkskmarekspartz/open-knowledge:copilot/should-workflows-run-on-forksCopy head branch name to clipboard