release-7.5.0 release notes: add two TiCDC parameter changes (#16585) (…

…#16590)

releases/release-7.5.0.md

@@ -180,6 +180,8 @@ Compared with the previous LTS 7.1.0, 7.5.0 includes new features, improvements,
 | BR | [`--ignore-stats`](/br/br-snapshot-manual.md#back-up-statistics) | Newly added | Controls whether to back up and restore database statistics. When you set this parameter to `false`, the br command-line tool supports backing up and restoring statistics of columns, indexes, and tables. |
 | TiCDC | [`case-sensitive`](/ticdc/ticdc-changefeed-config.md) | Modified | Changes the default value from `true` to `false` after further tests, which means that the table names and database names in the TiCDC configuration file are case-insensitive by default. |
 | TiCDC | [`sink.dispatchers.partition`](/ticdc/ticdc-changefeed-config.md) | Modified | Controls how TiCDC dispatches incremental data to Kafka partitions. v7.5.0 introduces a new value option `columns`, which uses the explicitly specified column values to calculate the partition number. |
+| TiCDC | [`encoding-worker-num`](/ticdc/ticdc-changefeed-config.md) | Newly added | Controls the number of encoding and decoding workers in the redo module. |
+| TiCDC | [`flush-worker-num`](/ticdc/ticdc-changefeed-config.md) | Newly added | Controls the number of flushing workers in the redo module. |
 | TiCDC | [`sink.column-selectors`](/ticdc/ticdc-changefeed-config.md) | Newly added | Controls the specified columns of data change events that TiCDC sends to Kafka when dispatching incremental data. |
 | TiCDC | [`sql-mode`](/ticdc/ticdc-changefeed-config.md) | Newly added | Specifies the SQL mode used by TiCDC when parsing DDL statements. The default value is the same as the default SQL mode of TiDB. |
 | TiDB Lightning | `--importer` | Deleted | Specifies the address of TiKV-importer, which is deprecated in v7.5.0. |