Fix $this calls to static ones when relevant

Author: alexandre-daubois

Firewall/ContextListener.php

@@ -207,7 +207,7 @@ protected function refreshUser(TokenInterface $token): ?TokenInterface
                 $newToken->setUser($refreshedUser, false);
 
                 // tokens can be deauthenticated if the user has been changed.
-                if ($token instanceof AbstractToken && $this->hasUserChanged($user, $newToken)) {
+                if ($token instanceof AbstractToken && self::hasUserChanged($user, $newToken)) {
                     $userDeauthenticated = true;
 
                     $this->logger?->debug('Cannot refresh token because user has changed.', ['username' => $refreshedUser->getUserIdentifier(), 'provider' => $provider::class]);