update release notes

Author: roycaihw

CHANGELOG.md

@@ -6,6 +6,10 @@ Kubernetes API Version: To Be Updated
 - Support for the dryRun parameter has been added to the dynamic client. ([kubernetes-client/python-base#247](https://github.com/kubernetes-client/python-base/pull/247), [@gravesm](https://github.com/gravesm))
 - The `python2` support will be removed in 18.0.0 beta release. All the tests will use `python3` versions. ([kubernetes-client/python-base#238](https://github.com/kubernetes-client/python-base/pull/238), [@Priyankasaggu11929](https://github.com/Priyankasaggu11929))
 - The dynamic client now supports customizing http "Accept" header through the `header_params` parameter, which can be used to customizing API server response, e.g. retrieving object metadata only. ([kubernetes-client/python-base#236](https://github.com/kubernetes-client/python-base/pull/236), [@Yashks1994](https://github.com/Yashks1994))
+- Allow optional list of YAML objects as param to `create_from_yaml` util [kubernetes-client/python#1403](https://github.com/kubernetes-client/python/pull/1403)
+
+**Bug Fix:**
+- Fix empty yaml document in `create_from_yaml` [kubernetes-client/python#1506](https://github.com/kubernetes-client/python/pull/1506)
 
 # v18.20.0b1