[ISSUE #2192] Typo fix in DefaultMQProducerImpl.java

fix typo

client/src/main/java/org/apache/rocketmq/client/impl/producer/DefaultMQProducerImpl.java

@@ -1115,7 +1115,7 @@ public class DefaultMQProducerImpl implements MQProducerInner {
 
                 mq = mQClientFactory.getClientConfig().queueWithNamespace(selector.select(messageQueueList, userMessage, arg));
             } catch (Throwable e) {
-                throw new MQClientException("select message queue throwed exception.", e);
+                throw new MQClientException("select message queue threw exception.", e);
             }
 
             long costTime = System.currentTimeMillis() - beginStartTime;