gitlab: add new line to end of data.json file

pkgs/applications/version-management/gitlab/data.json

@@ -10,4 +10,4 @@
     "GITLAB_SHELL_VERSION": "13.7.0",
     "GITLAB_WORKHORSE_VERSION": "8.46.0"
   }
-}
+}

pkgs/applications/version-management/gitlab/update.py

@@ -117,6 +117,7 @@ def update_data(rev: str):
 
     with open(data_file_path.as_posix(), 'w') as f:
         json.dump(data, f, indent=2)
+        f.write("\n")
 
 
 @cli.command('update-rubyenv')