Fix review comments.

Author: shishir-a412ed

README.md

@@ -147,7 +147,7 @@ You need to install CNI plugins on Nomad client nodes under `/opt/cni/bin` befor
 
 **Instructions for installing CNI plugins.**<br/>
 ```
- $ curl -L -o cni-plugins.tgz https://github.com/containernetworking/plugins/releases/download/v0.8.1/cni-plugins-linux-amd64-v0.8.1.tgz
+ $ curl -L -o cni-plugins.tgz https://github.com/containernetworking/plugins/releases/download/v0.8.6/cni-plugins-linux-amd64-v0.8.6.tgz
  $ sudo mkdir -p /opt/cni/bin
  $ sudo tar -C /opt/cni/bin -xzf cni-plugins.tgz
 ```