Update return documentation - dict to listPartially revert return value documentation for vm module - dict vs list

Before commit
53c5e76 (in main, same as
d9218cb in v1.2.0)
documentation said vm module returns in record field
a list with a single item.

This is still true, so leave this in documentation.

We might later change that, so that vm module will actually return record
with type dict.

Author: PolonaM

plugins/modules/vm.py

@@ -269,7 +269,8 @@
   description:
     - Created VM, if creating the record. If deleting the record, none is returned.
   returned: success
-  type: dict
+  type: list
+  elements: dict
   contains:
     vm_name:
       description: Human-readable virtual machine name