add 'cheatsheet-kubernetes-A4'

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -700,6 +700,7 @@ performance of any of your sites from across the globe.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jessfraz/dockerfiles"><b>dockerfiles</b></a> - various Dockerfiles I use on the desktop and on servers.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/kelseyhightower/kubernetes-the-hard-way"><b>kubernetes-the-hard-way</b></a> - bootstrap Kubernetes the hard way on Google Cloud Platform. No scripts.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/jamesward/kubernetes-the-easy-way"><b>kubernetes-the-easy-way</b></a> - bootstrap Kubernetes the easy way on Google Cloud Platform. No scripts.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/dennyzhang/cheatsheet-kubernetes-A4"><b>cheatsheet-kubernetes-A4</b></a> - Kubernetes CheatSheets in A4.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://github.com/kabachook/k8s-security"><b>k8s-security</b></a> - kubernetes security notes and best practices.<br>
 </p>