kubectl-cheatsheet - patch, added example for add (#4546)

* kubectl-cheatsheet - patch, added example for add

* Changed patch example to use k8s native resource

* Removed line from kubectl-cheatsheet

docs/user-guide/kubectl-cheatsheet.md

@@ -159,7 +159,6 @@ $ kubectl autoscale deployment foo --min=2 --max=10                # Auto scale
 ```
 
 ## Patching Resources
-Patch a resource(s) with a strategic merge patch.
 
 ```console
 $ kubectl patch node k8s-node-1 -p '{"spec":{"unschedulable":true}}' # Partially update a node
@@ -172,6 +171,9 @@ $ kubectl patch pod valid-pod --type='json' -p='[{"op": "replace", "path": "/spe
 
 # Disable a deployment livenessProbe using a json patch with positional arrays
 $ kubectl patch deployment valid-deployment  --type json   -p='[{"op": "remove", "path": "/spec/template/spec/containers/0/livenessProbe"}]'
+
+# Add a new element to a positional array 
+$ kubectl patch sa default --type='json' -p='[{"op": "add", "path": "/secrets/1", "value": {"name": "whatever" } }]'
 ```
 
 ## Editing Resources