Add missing dots at the end of exception messages

Author: fabpot

Transport/Connection.php

@@ -470,7 +470,7 @@ public function channel(): \AMQPChannel
                 $credentials['password'] = '********';
                 unset($credentials['delay']);
 
-                throw new \AMQPException(sprintf('Could not connect to the AMQP server. Please verify the provided DSN. (%s)', json_encode($credentials)), 0, $e);
+                throw new \AMQPException(sprintf('Could not connect to the AMQP server. Please verify the provided DSN. (%s).', json_encode($credentials)), 0, $e);
             }
             $this->amqpChannel = $this->amqpFactory->createChannel($connection);