Improve releasing during v0.18.8

[cwlbraa]

No description provided.

[jedevc]

Pushed a couple updates, realized a couple things hadn't been bumped (and also saw that the instructions that should bump releaser weren't actually correct, have a fix for this in #10411).

[fidencio]

For my own knowledge here, is this bump done by a script or manually?

Answering my own question here, manually. :-)

And I can see a nice example of what's sed'ed in the RELEASING document, which helps me to properly name runners when needed.

 - e.g. if bumping 0.12.6->0.12.7, can run `find .github/ -type f -exec sed -i 's/0-12-6/0-12-7/g; s/0\.12\.6/0\.12\.7/g' {} +`

Thanks!