Update cni.md

Author: sharmasushant

docs/cni.md

@@ -96,7 +96,7 @@ Logs generated by `azure-vnet-ipam` plugin are available in `/var/log/azure-vnet
      kubectl get nodes -o name | cut -d / -f 2 | xargs -I{}  -n1 ssh -tt {} -t 'wget -O /tmp/upgrade-cni.sh https://raw.githubusercontent.com/Azure/azure-container-networking/master/scripts/install-cni-plugin.sh; chmod 755 /tmp/upgrade-cni.sh; ls -l /tmp/upgrade-cni.sh; sudo /tmp/upgrade-cni.sh v1.0.11; echo 'upgraded node ' {}; echo 'sleeping for 5 seconds before moving on to next node... press ctrl-c if you want to abort';  sleep 5'
 ```
  
-3. Uncordon all agent nodes using below command
+4. Uncordon all agent nodes using below command
 ```bash
      kubectl get nodes -o name | cut -d / -f 2 |  xargs -I{} -n1 kubectl uncordon  {}
 ```