Updated image with litmuschaos/k8s:latest required for predefined workflows (#430)

Signed-off-by: Amit Kumar Das <amitkumar.das@mayadata.io>

workflows/sock-shop-demo/usingPromProbe/workflow_cron.yaml

@@ -52,7 +52,7 @@ spec:
 
     - name: install-chaos-experiments
       container:
-        image: alpine/k8s:1.18.2
+        image: litmuschaos/k8s:latest
         command: [sh, -c]
         args:
           - "kubectl apply -f https://hub.litmuschaos.io/api/chaos/master?file=charts/generic/experiments.yaml -n
@@ -435,7 +435,7 @@ spec:
     
     - name: revert-chaos
       container:
-        image: alpine/k8s:1.18.2
+        image: litmuschaos/k8s:latest
         command: [sh, -c]
         args: 
           [