ovirt: Clarify secrets configuration (#39501)

Fixes: https://github.com/ansible/ansible/issues/39478

contrib/inventory/ovirt.ini

@@ -19,7 +19,8 @@
 # Author: Josha Inglis <jinglis@iix.net> based on the gce.ini by Eric Johnson <erjohnso@google.com>
 
 [ovirt]
-# ovirt Service Account configuration information can be stored in the
+# For ovirt.py script, which can be used with Python SDK version 3
+# Service Account configuration information can be stored in the
 # libcloud 'secrets.py' file.  Ideally, the 'secrets.py' file will already
 # exist in your PYTHONPATH and be picked up automatically with an import
 # statement in the inventory script.  However, you can specify an absolute