Update code examples to skip run for now

Author: ankur22

docs/sources/k6/next/javascript-api/k6-browser/frame/waitfornavigation.md

@@ -46,6 +46,8 @@ Events can be either:
 
 {{< code >}}
 
+<!-- md-k6:skip -->
+
 ```javascript
 import { browser } from 'k6/browser';
 

docs/sources/k6/next/javascript-api/k6-browser/frame/waitforurl.md

@@ -42,6 +42,8 @@ Events can be either:
 
 {{< code >}}
 
+<!-- md-k6:skip -->
+
 ```javascript
 import { browser } from 'k6/browser';
 

docs/sources/k6/next/javascript-api/k6-browser/page/waitfornavigation.md

@@ -93,6 +93,8 @@ export default async function () {
 
 {{< code >}}
 
+<!-- md-k6:skip -->
+
 ```javascript
 import { browser } from 'k6/browser';
 

docs/sources/k6/next/javascript-api/k6-browser/page/waitforurl.md

@@ -42,6 +42,8 @@ Events can be either:
 
 {{< code >}}
 
+<!-- md-k6:skip -->
+
 ```javascript
 import { browser } from 'k6/browser';