Those emails never go to the "Promotions" or "Updates" tab of Gmail and make it directly into my Primary inbox

If you're working on developer related products and using Github emails as a marketing target you should stop! Those emails are not meant for marketing.

Edit: Today I learned you can set your email to a noreply email provided by Github[1][2]

[1] https://news.ycombinator.com/item?id=32553451

[2] https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-personal-account-on-github/managing-email-preferences/setting-your-commit-email-address#setting-your-commit-email-address-on-github