[codex] pin pnpm in GitHub workflows#609

Sean-Kenneth-Doherty wants to merge 2 commits into

firstcontributions:mainfirstcontributions/firstcontributions.github.io:mainfrom

Sean-Kenneth-Doherty:codex/pin-preview-pnpmSean-Kenneth-Doherty/firstcontributions.github.io:codex/pin-preview-pnpmCopy head branch name to clipboard