Remove unnecessary blank line in OverkizClient docstring

Author: iMicknl

pyoverkiz/client.py

@@ -642,7 +642,6 @@ async def execute_action_group(
         The executed action group does not have to be persisted on the server before use.
         Per-session rate-limit : 1 calls per 28min 48s period for all operations of the same category (exec)
         """
-
         # Build a logical (snake_case) payload using model helpers and convert it
         # to the exact JSON schema expected by the API (camelCase + small fixes).
         payload = {"label": label, "actions": [a.to_payload() for a in actions]}