GitHub drops “master” and “slave” terms amidst BLM backlash

When has GitHub used the term "slave"?

(Not a rhetorical question: there are many aspects of GitHub that I am not familiar with.)

now I'm waiting for dropping the word "master" from things like:

- Master Chef

- Chessmaster

- Master's Degree

- ATP Masters

- MasterClass

and so on...this is so ridiculous.