Add a note about [#22899](https://trac.torproject.org/projects/tor/ticket/22899). ([diff](https://trac.torproject.org/projects/tor/wiki/doc/TorBrowser/Sandbox/Linux?action=diff&version=26)) URL: https://trac.torproject.org/projects/tor/wiki/doc/TorBrowser/Sandbox/Linux?version=26