fix wrong order of comments (#899)

Signed-off-by: vincent-pli <[email protected]>

Author: vincent-pli

src/mcp/types.py

@@ -350,12 +350,12 @@ class ProgressNotificationParams(NotificationParams):
     total is unknown.
     """
     total: float | None = None
+    """Total number of items to process (or total progress required), if known."""
+    message: str | None = None
     """
     Message related to progress. This should provide relevant human readable 
     progress information.
     """
-    message: str | None = None
-    """Total number of items to process (or total progress required), if known."""
     model_config = ConfigDict(extra="allow")