Merge pull request kubernetes#2243 from SergeyKanzhelev/patch-1

Updating to reflect the today state of PodOverhead

Author: k8s-ci-robot

keps/sig-node/688-pod-overhead/README.md

@@ -28,6 +28,7 @@
   - [Leaving the PodSpec unchanged](#leaving-the-podspec-unchanged)
 - [Implementation History](#implementation-history)
   - [Version 1.16](#version-116)
+  - [Version 1.18](#version-118)
 <!-- /toc -->
 
 ## Release Signoff Checklist
@@ -316,3 +317,6 @@ Cons:
 
 ### Version 1.16
 - Implemented as Alpha.
+
+### Version 1.18
+- Promoted to Beta.

keps/sig-node/688-pod-overhead/kep.yaml

@@ -16,5 +16,5 @@ approvers:
   - "@derekwaynecarr"
 editor: Eric Ernst
 creation-date: 2019-02-26
-last-updated: 2020-01-29
-status: implemented (alpha)
+last-updated: 2020-10-27
+status: implemented (beta)