I can't believe the whining comments here so far. GitHub can contribute to any organization it wants to.
Personally, I think the Ada Initiative is doing far more harm than good. They're pushing a strange brand of coddling and gender privilege.
If the Ada Initiative didn't affect the rest of the industry at all, then they wouldn't be considered effective at their mission.
Whether or not you agree with the way they approach their mission is another question.
Additionally, it's not like we have a dearth of men in programming. They seem to be doing just fine.