use progress() method's message param not context

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

Author: aksheyd

src/mcp/shared/progress.py

@@ -47,7 +47,7 @@ async def progress(self, amount: float, message: str | None = None) -> None:
         self.current += amount
 
         await self.session.send_progress_notification(
-            self.progress_token, self.current, total=self.total, message=self.message
+            self.progress_token, self.current, total=self.total, message=message
         )