Update docblock regarding Jira cloud parameters

Co-authored-by: adehad <[email protected]>

Author: eljulians

jira/client.py

@@ -2816,7 +2816,7 @@ def search_users(
         query=None,
     ):
         """Get a list of user Resources that match the specified search string.
-        "username" query parameter is deprecated; the expected parameter now is "query", which can just be the full
+        "username" query parameter is deprecated in Jira Cloud; the expected parameter now is "query", which can just be the full
         email again. But the first parameter is kept for backwards compatibility.
 
         :param user: a string to match usernames, name or email against.