Add branch selection

[mourner]

Get a status badge for all GitHub Action runs on the master branch of a repository:

It would be great to add the ability to specify the branch to check, e.g. ?branch=foo, like with Travis/Circle CI badges.

Thanks you for a nice tool!

[tunnckoCore]

Good idea. Btw, we will implement github actions badges on @badgen soon, stay tuned both of you :)

[JasonEtco]

Closing this because GitHub Actions now has official badge support!