Fix syntax error

Author: pierredup

messenger.rst

@@ -2094,7 +2094,7 @@ is it up or down. It is possible to do so by dispatching a
         public function ping(): void
         {
             // An HttpExceptionInterface is thrown on 3xx/4xx/5xx
-            $this->bus->dispatch(new PingWebhookMessage('GET', 'https://example.com/status');
+            $this->bus->dispatch(new PingWebhookMessage('GET', 'https://example.com/status'));
 
             // Ping, but does not throw on 3xx/4xx/5xx
             $this->bus->dispatch(new PingWebhookMessage('GET', 'https://example.com/status', throw: false);