Update the release PR if urgent PRs have been merged to the release branch

[systay]

[frouioui]

@systay, what do you mean by urgent PRs?

[systay]

This happened during the last release - we had created the release PR, and then we noticed that we needed to get more PRs into the release. The solution is pretty easy today - uncheck the step in the release issue, remove the PR, and recreate the release PR. I was just thinking it would be nice to have all this as a step in the releaser and not have to be a hack like today