update documentation for dictionaries (#59354)

it has been fixed if using 0.9.0 or newer

ref https://github.com/ansible/ansible/pull/49053#issuecomment-511073083

lib/ansible/modules/clustering/k8s/k8s.py

@@ -41,10 +41,11 @@ extends_documentation_fragment:
   - k8s_auth_options
 
 notes:
-  - If you are trying to remove an item from an associative array/dictionary,
-    for example a label or an annotation, you will need to explicitly set the
-    value of the item to be removed to `null`. Simply deleting the entry in the
-    dictionary will not remove it from openshift or kubernetes.
+  - If your OpenShift Python library is not 0.9.0 or newer and you are trying to
+    remove an item from an associative array/dictionary, for example a label or
+    an annotation, you will need to explicitly set the value of the item to be
+    removed to `null`. Simply deleting the entry in the dictionary will not
+    remove it from openshift or kubernetes.
 
 options:
   merge_type: