fix: java doc incorrectness

Author: chanjarster

weixin-java-mp/src/main/java/me/chanjar/weixin/mp/bean/outxmlbuilder/TransferCustomerServiceBuilder.java

@@ -5,7 +5,7 @@
 /**
  * 客服消息builder
  * <pre>
- * 用法: WxMpCustomMessage m = WxMpCustomMessage.TRANSFER_CUSTOMER_SERVICE().content(...).toUser(...).build();
+ * 用法: WxMpCustomMessage m = WxMpXmlOutMessage.TRANSFER_CUSTOMER_SERVICE().content(...).toUser(...).build();
  * </pre>
  *
  * @author chanjarster
@@ -25,4 +25,4 @@ public WxMpXmlOutTransferCustomerServiceMessage build() {
     m.setKfAccount(kfAccount);
     return m;
   }
-}
+}