fix(comment typo): (#959)

Thanks!

Author: JinXJinX

starlette/routing.py

@@ -572,7 +572,7 @@ async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
         if partial is not None:
             #  Handle partial matches. These are cases where an endpoint is
             # able to handle the request, but is not a preferred option.
-            # We use this in particular to deal with "406 Method Not Found".
+            # We use this in particular to deal with "405 Method Not Allowed".
             scope.update(partial_scope)
             await partial.handle(scope, receive, send)
             return