Update changelog

CHANGELOG/CHANGELOG-1.9.md

@@ -15,10 +15,12 @@ When cutting a new release, update the `unreleased` heading to the tag being gen
 
 ## unreleased
 
+* [CHANGE] [#1037](https://github.com/k8ssandra/k8ssandra-operator/issues/1037) Upgrade Medusa to v0.16.1
 * [ENHANCEMENT] [#1046](https://github.com/k8ssandra/k8ssandra-operator/issues/1046) Add detailed backup information in the MedusaBackup CRD status
 * [BUGFIX] [#1027](https://github.com/k8ssandra/k8ssandra-operator/issues/1027) Point system-logger image to use the v1.16.0 tag instead of latest
 * [BUGFIX] [#1026](https://github.com/k8ssandra/k8ssandra-operator/issues/1026) Fix DC name overrides not being properly handled
 * [BUGFIX] [#981](https://github.com/k8ssandra/k8ssandra-operator/issues/981) Fix race condition in K8ssandraTask status update
 * [BUGFIX] [#1023](https://github.com/k8ssandra/k8ssandra-operator/issues/1023) Ensure merged serverVersion passed to IsNewMetricsEndpointAvailable()
 * [DOCS] [#1019](https://github.com/k8ssandra/k8ssandra-operator/issues/1019) Add PR review guidelines documentation
-* [BUGFIX] [#1017](https://github.com/k8ssandra/k8ssandra-operator/issues/1017) Fix MedusaTask to delete only its own backups
+* [BUGFIX] [#1017](https://github.com/k8ssandra/k8ssandra-operator/issues/1017) Fix MedusaTask to delete only its own backups
+* [TESTING] [#1037](https://github.com/k8ssandra/k8ssandra-operator/issues/1037) Add non regression test for Medusa issue with scale up after a restore