Add warning to docstring

Author: WilliamBergamin

slack_bolt/context/say_stream/async_say_stream.py

@@ -39,6 +39,10 @@ async def __call__(
         thread_ts: Optional[str] = None,
         **kwargs,
     ) -> AsyncChatStream:
+        """Starts a new chat stream with context.
+
+        Warning: This is an experimental feature and may change in future versions.
+        """
         warnings.warn(
             "say_stream is experimental and may change in future versions.",
             category=ExperimentalWarning,

slack_bolt/context/say_stream/say_stream.py

@@ -39,6 +39,10 @@ def __call__(
         thread_ts: Optional[str] = None,
         **kwargs,
     ) -> ChatStream:
+        """Starts a new chat stream with context.
+
+        Warning: This is an experimental feature and may change in future versions.
+        """
         warnings.warn(
             "say_stream is experimental and may change in future versions.",
             category=ExperimentalWarning,