chore: update CHANGELOG.md with change

Author: cdobbyn

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+### enhancement
+- Add granular resource config for kubelet in [#918](https://github.com/newrelic/nri-kubernetes/pull/918)
+
 ### enhancement
 - Add changelog workflow by @svetlanabrennan in [#837](https://github.com/newrelic/nri-kubernetes/pull/837)
 - Update changelog workflow @svetlanabrennan in [#843](https://github.com/newrelic/nri-kubernetes/pull/843)