[BEAM-11104] Add self-checkpointing to CHANGES.md (apache#17612)

CHANGES.md

@@ -63,6 +63,7 @@
 ## New Features / Improvements
 
 * X feature added (Java/Python) ([BEAM-X](https://issues.apache.org/jira/browse/BEAM-X)).
+* Go SDK users may now write self-checkpointing Splittable DoFns to read from streaming sources. ([BEAM-11104](https://issues.apache.org/jira/browse/BEAM-11104))
 
 ## Breaking Changes
 
@@ -99,7 +100,6 @@
 
 * 'Manage Clusters' JupyterLab extension added for users to configure usage of Dataproc clusters managed by Interactive Beam (Python) ([BEAM-14130](https://issues.apache.org/jira/browse/BEAM-14130)).
 * Pipeline drain support added for Go SDK ([BEAM-11106](https://issues.apache.org/jira/browse/BEAM-11106)). **Note: this feature is not yet fully validated and should be treated as experimental in this release.**
-* Go SDK users may now write self-checkpointing Splittable DoFns to read from streaming sources. **Note: this feature is not yet fully validated and should be treated as experimental in this release.** ([BEAM-11104](https://issues.apache.org/jira/browse/BEAM-11104))
 
 ## Breaking Changes