Update docs/helpers.rst

Co-authored-by: Ran Benita <[email protected]>

Author: kingbuzzman

docs/helpers.rst

@@ -428,7 +428,7 @@ Example
   :param num: expected number of queries
   :param connection: optional database connection
   :param str info: optional info message to display on failure
-  :param str using: optional database connection name
+  :param str using: optional database alias
 
 This fixture allows to check for an expected number of DB queries.