Add relese note summary section

Signed-off-by: Matt Lord <[email protected]>

changelog/22.0/22.0.0/summary.md

@@ -8,6 +8,7 @@
   - **[RPC Changes](#rpc-changes)**
   - **[Prefer not promoting a replica that is currently taking a backup](#reparents-prefer-not-backing-up)**
   - **[VTOrc Config File Changes](#vtorc-config-file-changes)**
+  - **[Support for More Efficient JSON Replication](#efficient-json-replication)**
 - **[Minor Changes](#minor-changes)**
   - **[VTTablet Flags](#flags-vttablet)**
   - **[Topology read concurrency behaviour changes](#topo-read-concurrency-changes)**
@@ -59,6 +60,12 @@ The following fields can be dynamically changed -
 
 To upgrade to the newer version of the configuration file, first switch to using the flags in your current deployment before upgrading. Then you can switch to using the configuration file in the newer release.
 
+### <a id="efficient-json-replication"/>Support for More Efficient JSON Replication</a>
+
+In [#7345](https://github.com/vitessio/vitess/pull/17345) we added support for [`--binlog-row-value-options=PARTIAL_JSON`](https://dev.mysql.com/doc/refman/en/replication-options-binary-log.html#sysvar_binlog_row_value_options). You can read more about [this feature added to MySQL 8.0 here](https://dev.mysql.com/blog-archive/efficient-json-replication-in-mysql-8-0/).
+
+If you are using MySQL 8.0 or later and using JSON columns, you can now enable this MySQL feature across your Vitess cluster(s) to lower the disk space needed for binary logs and improve the CPU and memory usage in both `mysqld` (standard intrashard MySQL replication) and `vttablet` ([VReplication](https://vitess.io/docs/reference/vreplication/vreplication/)) without losing any capabilities or features.
+
 
 ## <a id="minor-changes"/>Minor Changes</a>