Update release-4.0.12.md (pingcap#5197)

releases/release-4.0.12.md

@@ -52,6 +52,7 @@ TiDB version: 4.0.12
     + TiCDC
 
         - Add a double confirmation when users create or resume the changefeed with the `start-ts` or `checkpoint-ts` 1 day before the current timestamp [#1497](https://github.com/pingcap/ticdc/pull/1497)
+        - Add Grafana panels for the Old Value feature [#1571](https://github.com/pingcap/ticdc/pull/1571)
 
     + Backup & Restore (BR)
 
@@ -119,6 +120,9 @@ TiDB version: 4.0.12
 
         - Fix a disorder issue of the `resolved ts` event [#1464](https://github.com/pingcap/ticdc/pull/1464)
         - Fix a data loss issue caused by wrong table scheduling due to the network problem [#1508](https://github.com/pingcap/ticdc/pull/1508)
+        - Fix a bug of untimely release of resources after a processor is stopped [#1547](https://github.com/pingcap/ticdc/pull/1547)
+        - Fix a bug that the transaction counter is not correctly updated, which might cause database connection leak [#1524](https://github.com/pingcap/ticdc/pull/1524)
+        - Fix the issue that multiple owners can co-exist when PD has jitter, which might lead to table missing [#1540](https://github.com/pingcap/ticdc/pull/1540)
 
     + Backup & Restore (BR)