Although the commit shows github-actions as the author, tags show invalid-email-address - see https://github.com/ACCESS-NRI/access-om2-configs/releases/tag/release-1deg_jra55_ryf-1.0

Scouring the internet, we see that the commit email for github-actions should contain the user id for the bot to have the correct icon everywhere: see actions/checkout#1184

Implement the features as noted in that PR.