Fixes #21377 This marks all "defined" languages in the `.gitattributes` file so they are not removed if they are not of type `programming` or `markup`. ![grafik](https://user-images.githubusercontent.com/1666336/194942021-1e641b60-bb8a-49c6-9a1c-413e7c4ba17d.png) Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: Lauris BH <lauris@nix.lv> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>