Add note about third-party pull requests for GitHub Actions#3516

eXpl0it3r wants to merge 1 commit intoNuGet:mainNuGet/docs.microsoft.com-nuget:mainfrom

eXpl0it3r:feature/clarify-trust-publishingeXpl0it3r/docs.microsoft.com-nuget:feature/clarify-trust-publishingCopy head branch name to clipboard