Update README for 1.27 (#3915)

Author: ktsakalozos

README.md

@@ -1,6 +1,6 @@
 <img src="docs/images/MicroK8s-logo-RGB-2022.png" width="400px;" />
 
-![](https://img.shields.io/badge/Kubernetes-1.26-326de6.svg)
+![](https://img.shields.io/badge/Kubernetes-1.27-326de6.svg)
 
 <img src="/docs/images/certified_kubernetes_color-222x300.png" align="right" width="200px">