Tag the desired release commit with an annotated vX.Y.Z tag and push to GitHub. This is done from the command line, e.g.
vX.Y.Z
$ git tag -a vX.Y.Z -m "vX.Y.Z" $ git push origin tag vX.Y.Z
In GitHub, run the "Publish to PyPI" workflow from the vX.Y.Z tag you just made.
Reviewer: review the deployment request, at a minimum verifying that the tag is appropriate and on the desired commit.