[bootstrap] Add autogenerated fish files to gitignore

Author: msanders

.gitignore

@@ -4,5 +4,7 @@ symlinks/emacs/.config/doom/config.el
 symlinks/emacs/.config/doom/packages.el
 symlinks/emacs/.config/doom/secrets.el
 symlinks/fish/.config/fish/completions
+symlinks/fish/.config/fish/conf.d
 symlinks/fish/.config/fish/fish_variables
+symlinks/fish/.config/fish/functions
 symlinks/tmux/.config/tmux/plugins