What feature is it?

Add a Closed/Open tip for GitHub PR feeds

What problem does this feature solve?

Currently, if we access something like /github/issue/anope/anope/closed we get something like anope/anope Closed Issues, but not on PRs. That'd be a good addition since shows distinctively that a PR was closed/merged/created

Additional description

No response

This is not a duplicated feature request or new RSS proposal

• I have searched existing issues to ensure this feature has not already been requested and this is not a new RSS proposal.