Set a new url (#45373)

Author: laoneo

libraries/src/Updater/UpdateAdapter.php

@@ -255,13 +255,13 @@ protected function getUpdateSiteResponse($options = [])
             'headers' => $headers,
         ]);
         $dispatcher->dispatch('onInstallerBeforeUpdateSiteDownload', $event);
-        $url     = $event->getArgument('url', $url);
+        $newUrl  = $event->getArgument('url', $url);
         $headers = $event->getArgument('headers', $headers);
 
         // Http transport throws an exception when there's no response.
         try {
             $http     = HttpFactory::getHttp($httpOption);
-            $response = $http->get($url, $headers, 20);
+            $response = $http->get($newUrl, $headers, 20);
         } catch (\RuntimeException) {
             $response = null;
         }