Docs: Small fix for k8s example (#397)

Docs: Small fix for k8s example

SUMMARY
Update the k8s example to use kubernetes.core.k8s instead of the bare k8s and fix the indentation.
ISSUE TYPE

Docs Pull Request

COMPONENT NAME
kubernetes.core
ADDITIONAL INFORMATION
Just a small documentation fix. 😉

Reviewed-by: Mike Graves <mgraves@redhat.com>

docs/docsite/rst/kubernetes_scenarios/scenario_k8s_object.rst

@@ -54,20 +54,20 @@ In this use case / example, we will create a Pod in the given Kubernetes Cluster
         - kubernetes.core
       tasks:
         - name: Create a pod
-          k8s:
+          kubernetes.core.k8s:
             state: present
             definition:
-            apiVersion: v1
-            kind: Pod
-            metadata:
+              apiVersion: v1
+              kind: Pod
+              metadata:
                 name: "utilitypod-1"
                 namespace: default
                 labels:
-                    app: galaxy
-            spec:
+                  app: galaxy
+              spec:
                 containers:
-                - name: utilitypod
-                  image: busybox
+                  - name: utilitypod
+                    image: busybox
 
 Since Ansible utilizes the Kubernetes API to perform actions, in this use case we will be connecting directly to the Kubernetes cluster.