docs: add until example to k8s_info

I would liked to have an example like this when I was using the
documentation.

Author: MindTooth

plugins/modules/k8s_info.py

@@ -119,6 +119,19 @@
     namespace: default
     wait_sleep: 10
     wait_timeout: 360
+
+- name: Wait for OpenShift bootstrap to complete
+  kubernetes.core.k8s_info:
+    kind: ConfigMap
+    name: bootstrap
+    namespace: kube-system
+  register: ocp_bootstrap_status
+  until: ocp_bootstrap_cm_status.resources is defined and
+    (ocp_bootstrap_cm_status.resources | length > 0) and
+    (ocp_bootstrap_cm_status.resources[0].data.status is defined) and
+    (ocp_bootstrap_cm_status.resources[0].data.status == 'complete')
+  retries: 60
+  delay: 15
 """
 
 RETURN = r"""