Update ticdc/ticdc-debezium.md

Co-authored-by: nhsmw <nhsmwk@gmail.com>

ticdc/ticdc-debezium.md

@@ -160,7 +160,7 @@ The key fields of the preceding JSON data are explained as follows:
 | payload.source.db     | String   | The name of the database where the event occurs.    |
 | payload.source.table     | String  |  The name of the table where the event occurs.   |
 | schema.fields     | JSON   | The type information of each field in the payload, including the schema information of the row data before and after the change.   |
-| schema.name    | String  | The name of the schema, in the `"{cluster-name}.{schema-name}.{table-name}.Key"` format. |
+| schema.name    | String  | The name of the schema, in the `"{cluster-name}.{schema-name}.{table-name}.Envelope"` format. |
 | schema.optional| Boolean | Indicates whether the field is optional. When it is `true`, the field is optional.  |
 | schema.type    | String  | The data type of the field.                                      |