[cloud] Add version_added to route53 option 'state' - fixes #24306 (#24335)

* fix route53 documentation

* improve state option description and remove version_added

lib/ansible/modules/cloud/amazon/route53.py

@@ -29,7 +29,8 @@ description:
 options:
   state:
     description:
-      - Specifies the state of the resource record.
+      - Specifies the state of the resource record. As of Ansible 2.4, the I(command) option has been changed
+        to I(state) as default, but I(command) still works as well.
     required: true
     aliases: [ 'command' ]
     choices: [ 'present', 'absent', 'get', 'create', 'delete' ]