fix doc

README.md

@@ -67,12 +67,12 @@ const lpv = LichessPgnViewer(domElement, {
   pgn: 'e4 c5 Nf3 d6 e5 Nc6 exd6 Qxd6 Nc3 Nf6',
 });
 
-// lpv is an instance of Ctrl, providing some utilities such as:
+// lpv is an instance of PgnViewer , providing some utilities such as:
 lpv.goTo('first');
 lpv.goTo('next');
 lpv.flip();
 console.log(lpv.game);
-// see more in ctrl.ts
+// see more in pgnViewer.ts
 ```
 
 ### Configuration