Hah, "Verified" and I didn't even have to cough up $8/mo.

Thanks for the awesome tip on your blog, @jwildeboer

ref: https://jan.wildeboer.net/2022/06/Quick-Fix-Verified-Mastodon-Github/

A Quick Fix For The Verified Status for Github on your Mastodon Profile

Mastodon has a very light-weight method of proving that you are the owner (or, at least an editor) for the links on your profile page. Technically you add a <a rel="me" href="https://link.to/YourProfile>Verification</a> to the page you want to be verified.

Jan Wildeboer's Blog
@eric_capuano Hm. Somehow that doesn't seem to work for me 🤔
@jkbecker use the entire URL to your Mastadon profile, not just the handle.
@jkbecker disregard, I see it’s correct there. Try editing your Mastodon profile to remove and re-add the GitHub link. I had to mess with mine a time or two before it worked.