Use "|| true" so that empty updates don't create an error [ci skip]

.github/workflows/translations.yml

@@ -52,5 +52,5 @@ jobs:
           git status
           git config --global user.email "[email protected]"
           git config --global user.name "SuperTux Bot"
-          git commit -am "Update translations"
+          git commit -am "Update translations" || true
           git push https://git:[email protected]/SuperTux/supertux.git master