refactor: adopt new helpers in laravel 9

app/Http/Controllers/PostController.php

@@ -56,7 +56,7 @@ class PostController extends Controller
 
         // The user has the right to create a post here?
         if (! $category->getPermission()->reply_topic || ($topic->state == 'close' && ! $request->user()->group->is_modo)) {
-            return \redirect()->route('forums.index')
+            return \to_route('forums.index')
                 ->withErrors(\trans('forum.reply-topic-error'));
         }
 
@@ -72,7 +72,7 @@ class PostController extends Controller
         ]);
 
         if ($v->fails()) {
-            return \redirect()->route('forum_topic', ['id' => $topic->id])
+            return \to_route('forum_topic', ['id' => $topic->id])
                 ->withErrors($v->errors());
         }
 
@@ -211,7 +211,7 @@ class PostController extends Controller
         \abort_unless($user->group->is_modo || $user->id === $post->user_id, 403);
         $post->delete();
 
-        return \redirect()->route('forum_topic', ['id' => $post->topic->id])
+        return \to_route('forum_topic', ['id' => $post->topic->id])
             ->withSuccess(\trans('forum.delete-post-success'));
     }
 }