Make route getName optional

[jyrkidn]

Since 404 routes return null this breaks calling getName(). Adding ? fixes this

[what-the-diff]

PR Summary

• Improved handling of route name retrivals
  The code in the LanguageSwitch.php file, specifically in the isVisibleOutsidePanels method, has been updated to retrieve the name of a route in a safer way. It now uses an updated syntax request()->route()?->getName(), ensuring the application avoids potential errors when trying to access the name of a route that might not exist. The updated code provides enhanced stability and reduces the chance of unexpected crashes.