Ling Jin

cdc: add a description about checksum compatibility

4

### First-time contributors' checklist - [x] I've signed [**Contributor License Agreement**](https://cla-assistant.io/pingcap/docs-cn) that's required for repo owners to accept my contribution. ### What is changed, added or deleted? (Required) ### Which...

##### Description ##### Versions | Sarama | Kafka | Go | | ------ | ----- | --- | | v1.41.2 | | | ##### Configuration ```go ``` ##### Logs ```...