Fix 'Hover Provider Example' incorrect Promise syntax

website/src/website/data/playground-samples/extending-language-services/hover-provider-example/sample.js

@@ -31,8 +31,7 @@ monaco.editor.create(document.getElementById("container"), {
 
 function xhr(url) {
 	var req = null;
-	return new Promise(
+	return new Promise(function (c, e) {
-		function (c, e) {
 		req = new XMLHttpRequest();
 		req.onreadystatechange = function () {
 			if (req._canceled) {
@@ -56,10 +55,8 @@ function xhr(url) {
 		req.responseType = "";
 
 		req.send(null);
-		},
+	}).catch(function () {
-		function () {
 		req._canceled = true;
 		req.abort();
-		}
+	});
-	);
 }