add changelog, version_added

Author: resmo

changelogs/fragments/cs_instance-pod-cluster-args.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - cs_instance - The optional arguments ``pod`` and ``cluster`` has been added.

plugins/modules/cs_instance.py

@@ -141,12 +141,14 @@
       - Only considered when I(state=started) or instance is running.
       - Requires root admin privileges.
     type: str
+    version_added: 2.3.0
   pod:
     description:
       - Pod on which an instance should be deployed or started on.
       - Only considered when I(state=started) or instance is running.
       - Requires root admin privileges.
     type: str
+    version_added: 2.3.0
   domain:
     description:
       - Domain the instance is related to.