The minor release process involves creating cherry picks using the process documented at:

https://go.dev/wiki/MinorReleases#making-cherry-pick-cls

As recently suggested by @rsc, there's room to create a relui workflow that can be used to short-circuit the manual steps involved. It probably doesn't need to worry about fully handling unusual cases, or when merge conflicts are involved, but those are relatively rare.

Also relevant is CL 559295 (CC @rolandshoemaker) that does this for publishing private golang.org/x fixes (issue #65756).