Merge pull request #158 from xing-yang/changelog

Add changelog for v1.2.1 release

Author: k8s-ci-robot

CHANGELOG-1.2.md

@@ -1,3 +1,9 @@
+# Changelog since v1.2.0
+
+## Notable Changes
+
+- Cherry picks PR #138: Prebound snapshots will work correctly with CSI drivers that does not support ListSnasphots.([#156](https://github.com/kubernetes-csi/external-snapshotter/pull/156), [@hakanmemisoglu](https://github.com/hakanmemisoglu))
+
 # Changelog since v1.1.0
 
 ## Breaking Changes