Merge pull request #42141 from timchenxiaoyu/typofix

Automatic merge from submit-queue (batch tested with PRs 42141, 43447)

fix typo

retries and hierarchy  typo error

CHANGELOG.md

@@ -2886,7 +2886,7 @@ Features for this release were tracked via the use of the [kubernetes/features](
 - **Node**
   - [alpha] Added ability to preserve access to host userns when userns remapping is enabled in container runtime ([kubernetes/features#127](https://github.com/kubernetes/features/issues/127))
   - [alpha] Introducing the v1alpha1 CRI API to allow pluggable container runtimes; an experimental docker-CRI integration is ready for testing and feedback. ([docs](https://github.com/kubernetes/community/blob/master/contributors/devel/container-runtime-interface.md)) ([kubernetes/features#54](https://github.com/kubernetes/features/issues/54))
-  - [alpha] Kubelet launches container in a per pod cgroup hiearchy based on quality of service tier ([kubernetes/features#126](https://github.com/kubernetes/features/issues/126))
+  - [alpha] Kubelet launches container in a per pod cgroup hierarchy based on quality of service tier ([kubernetes/features#126](https://github.com/kubernetes/features/issues/126))
   - [beta] Kubelet integrates with memcg notification API to detect when a hard eviction threshold is crossed ([kubernetes/features#125](https://github.com/kubernetes/features/issues/125))
   - [beta] Introducing the beta version containerized node conformance test gcr.io/google_containers/node-test:0.2 for users to verify node setup. ([docs](http://kubernetes.io/docs/admin/node-conformance/)) ([kubernetes/features#84](https://github.com/kubernetes/features/issues/84))
 - **Scheduling**