Fix user locale update in LocalizationController

Corrected an error where the static method was being called on an instance. Switched from $User::update to $User->update to correctly update the user's locale in the LocalizationController. This ensures the user's locale is updated properly when authenticated.

src/Http/LocalizationController.php

@@ -14,7 +14,7 @@ public function changeLanguage(Request $request)
     {
         $User = $request->user();
 
-        $User::update( ['locale' => $request->language]);
+        $User->update( ['locale' => $request->language]);
 
         return redirect()->to(config('app.url').config('nova.path'));