gh-pages gets pushed to from branches

[evaherrada]

@ladyada What I've noticed is that gh-pages will get pushed to from branches other than master. I don't think this is really desired, so I can try to add a check to see if the branch is master or main before pushing to gh-pages but I wanted to check with you before starting on it in case it wasn't something you felt like needs fixing or not something you wanted me to fix.

[ladyada]

sure you can add special main/master-only handling