Fix phpcs errors in doc block.

src/Routing/Filter/AssetFilter.php

@@ -60,8 +60,8 @@ public function __construct($config = [])
     /**
      * Checks if a requested asset exists and sends it to the browser
      *
-     * @param \Cake\Event\Event $event containing the request and response object
-     * @return \Cake\Network\Response if the client is requesting a recognized asset, null otherwise
+     * @param \Cake\Event\Event $event Event containing the request and response object
+     * @return \Cake\Network\Response|null If the client is requesting a recognized asset, null otherwise
      * @throws \Cake\Network\Exception\NotFoundException When asset not found
      */
     public function beforeDispatch(Event $event)
@@ -124,7 +124,7 @@ protected function _getAssetFile($url)
      * @param \Cake\Network\Response $response The response object to use.
      * @param string $assetFile Path to the asset file in the file system
      * @param string $ext The extension of the file to determine its mime type
-     * @return void
+     * @return \Caken\Network\Response The updated response.
      */
     protected function _deliverAsset(Request $request, Response $response, $assetFile, $ext)
     {