comment the expected output of graph.draw() function (mdn#31458)

* commenting the expected output of graph.draw() function inside '/files/en-us/web/javascript/reference/statements/export
/index.md'

* Update files/en-us/web/javascript/reference/statements/export/index.md

---------

Co-authored-by: Joshua Chen <[email protected]>

files/en-us/web/javascript/reference/statements/export/index.md

@@ -249,7 +249,7 @@ graph.options = {
   thickness: "3px",
 };
 
-graph.draw();
+graph.draw(); // Logs "From graph draw function"
 console.log(cube(3)); // 27
 console.log(foo); // 4.555806215962888
 ```