dash: Use pin instead of favorites

Use the term 'pin' for adding new items to the dash
Note that this is only a string change.

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4976

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2136>

js/ui/dash.js

@@ -242,7 +242,7 @@ class ShowAppsIcon extends DashItemContainer {
             this._iconActor.set_hover(canRemove);
 
         if (canRemove)
-            this.setLabelText(_("Remove from Favorites"));
+            this.setLabelText(_('Unpin'));
         else
             this.setLabelText(_("Show Applications"));
     }