Via #35777, we have cases where a self-hosted user who doesn't run against
github.com leads to cases where they can't update the builtin Actions
when they're referenced by an `https://` URL.
As we already handle this for community actions, we can also handle this
for the builtin ones.
Co-Authored-By: Claude Sonnet 5 <jamie.tanna+claude-code@mend.io>
Jamie Tanna