Merge pull request #62084 from nickchase/patch-2

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Added downgrade notice to Changelog

**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note

```
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@ -199,6 +199,8 @@ In terms of networking, Kubernetes 1.10 is about control. Users now have beta su
## Before Upgrading
* If you need to downgrade from 1.10 to 1.9.x, downgrade to v1.9.6 to ensure PV and PVC objects can be deleted properly.
* In-place node upgrades to this release from versions 1.7.14, 1.8.9, and 1.9.4 are not supported if using subpath volumes with PVCs. Such pods should be drained from the node first.
* The minimum supported version of Docker is now 1.11; if you are using Docker 1.10 or below, be sure to upgrade Docker before upgrading Kubernetes. ([#57845](https://github.com/kubernetes/kubernetes/pull/57845), [@yujuhong](https://github.com/yujuhong))
@ -290,6 +292,8 @@ kind: KubeProxyConfiguration
## Known Issues
* If you need to downgrade from 1.10 to 1.9.x, downgrade to v1.9.6 to ensure PV and PVC objects can be deleted properly.
* Use of subPath module with hostPath volumes can cause issues during reconstruction ([#61446](https://github.com/kubernetes/kubernetes/issues/61446)) and with containerized kubelets ([#61456](https://github.com/kubernetes/kubernetes/issues/61456)). The workaround for this issue is to specify the complete path in the hostPath volume. Use of subPathmounts nested within atomic writer volumes (configmap, secret, downwardAPI, projected) does not work ([#61545](https://github.com/kubernetes/kubernetes/issues/61545)), and socket files cannot be loaded from a subPath ([#62377](https://github.com/kubernetes/kubernetes/issues/61377)). Work on these issues is ongoing.
* Kubeadm is currently omitting etcd certificates in a self-hosted deployment; this will be fixed in a point relelase. ([#61322](https://github.com/kubernetes/kubernetes/issues/61322))