Apply suggestion from @holtskinner

Co-authored-by: Holt Skinner <13262395+holtskinner@users.noreply.github.com>

Author: lkawka

src/a2a/server/request_handlers/rest_handler.py

@@ -279,7 +279,7 @@ async def list_tasks(
             context: Context provided by the server.
 
         Returns:
-            A list of dict representing the`Task` objects.
+            A list of `dict` representing the `Task` objects.
 
         Raises:
             NotImplementedError: This method is not yet implemented.