docs: correct versionadded string

Co-authored-by: Paillat <[email protected]>
Signed-off-by: Soheab <[email protected]>

Author: Soheab

docs/api/events.rst

@@ -1504,7 +1504,7 @@ Soundboard Sound
 
     This requires :attr:`Intents.members` to be enabled.
 
-    .. versionadded:: 2.4
+    .. versionadded:: 2.7
 
     :param payload: The raw event payload data.
     :type payload: :class:`RawMemberUpdateEvent`