Update v2chessbord.js

Author: mihail0011

docs/v2chessbord.js

@@ -72,6 +72,6 @@ class Chessboard {
     setpieces(this.board);
   };
   setboard(obj) {
-    obj.getElementById(`${f.}`)
+    obj.getElementById(`${f.coords[0]}.${f.coords[1]}`).innerHTML = `<img src="${getPieceImageSource(f.onstayed)}"></img>`;
   };
 };