TiCDC Debezium Protocol wrongly claimed DDL/WATERMARK event is supported since v9.0.0 (it is supported since v8.5.4-release.1)

[kennytm]

Change Request

Please answer the following questions before submitting your issue. Thanks!

1. Describe what you find is inappropriate or missing in the existing docs.

https://github.com/pingcap/docs/blob/master/ticdc/ticdc-debezium.md

2. Describe your suggestion or addition.

Replace "v9.0.0" with "New Architecture", linking to https://github.com/pingcap/docs/blob/master/ticdc/ticdc-architecture.md.

3. Provide some reference materials (such as documents and websites) if you could.

https://github.com/pingcap/ticdc/blob/v8.5.4-release.1/pkg/sink/codec/debezium/encoder.go#L37