Update docs to use setMobileEmulation properly
The custom config is wrapped in a "deviceMetrics" object
@@ -512,11 +512,11 @@ class Options extends Capabilities {
*
* __Example 2: Using Custom Screen Configuration__
*
- * let options = new chrome.Options().setMobileEmulation({
+ * let options = new chrome.Options().setMobileEmulation({deviceMetrics: {
* width: 360,
* height: 640,
* pixelRatio: 3.0
- * });
+ * }});
*
* let driver = chrome.Driver.createSession(options);
*
