Could not build RocketMQ example code on Spring Boot 3.0

When I am trying to build it with Spring Boot 3.0 and Java 17, the following error has been raised:

```
~/Downloads/demo/src/main/java/com/example/demo/demos/rocketmq/producer/MySource.java:3:51
java: cannot find symbol
symbol: class Output
location: package org.springframework.cloud.stream.annotation
```

It looks like in the latest Spring Cloud Stream 4.0.0 the annotation way has been deprecated.

Start with the failing MySource.java example and reproduce the build using Spring Boot 3.0, Java 17, and Spring Cloud Stream 4.0.0. Check the reported missing Output annotation and its surrounding usage; done means the RocketMQ example builds without that compilation error.

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