.gitconfig: Tweak `ca` alias
.gitconfig: Tweak `ca` alias

Thanks to @necolas! https://github.com/mathiasbynens/dotfiles/commit/15d4c9583d66be40a497706134b637e8c1f10ae6#commitcomment-1416521

troyxmccall/dotfiles,troyxmccall/dotfiles,troyxmccall/dotfiles