fix link to example
Summary:
fix link to example after
Closes
@@ -220,4 +220,4 @@ const configs = [{
}];
```
-For examples of more complex optimistic updates, including adding and removing from a list, see the [Relay Modern Todo example app](https://github.com/relayjs/relay-examples/tree/master/todo-modern).
+For examples of more complex optimistic updates, including adding and removing from a list, see the [Relay Modern Todo example app](https://github.com/relayjs/relay-examples/tree/master/todo).
