COPP-8737: Pin third-party actions#2

Lachlan Kidson (lachlankidson) wants to merge 1 commit intomainSkyscanner/gha-aws-oidc-sample:mainfrom

turbolift-pin-third-party-actionsSkyscanner/gha-aws-oidc-sample:turbolift-pin-third-party-actionsCopy head branch name to clipboard