When constructing an email, our PR links should consider the project a PR is coming from.
<rdar://problem/101760435>
Pull request: https://github.com/WebKit/WebKit/pull/5957
Committed 256157@main (5ac9a1b72cff): <https://commits.webkit.org/256157@main> Reviewed commits have been landed. Closing PR #5957 and removing active labels.