Update active-directory-b2c-html-how-to.md

Link to the page layout version

Author: yoelhor

includes/active-directory-b2c-html-how-to.md

@@ -3,7 +3,7 @@ author: mmacy
 ms.service: active-directory-b2c
 ms.subservice: B2C
 ms.topic: include
-ms.date: 02/12/2020
+ms.date: 02/26/2020
 ms.author: marsma
 ---
 ## Use custom page content
@@ -55,7 +55,7 @@ When using your own HTML and CSS files to customize the UI, host your UI content
 ## Guidelines for using custom page content
 
 - Use an absolute URL when you include external resources like media, CSS, and JavaScript files in your HTML file.
-- Add the `data-preload="true"` attribute in your HTML tags to control the load order for CSS and JavaScript. With `data-preload=true`, the page is constructed before being shown to the user. This attribute helps prevent the page from "flickering" by preloading the CSS file, without the un-styled HTML being shown to the user. The following HTML code snippet shows the use of the `data-preload` tag.
+- Using [page layout version](../articles/active-directory-b2c/page-layout.md) 1.2.0 and above, you can add the `data-preload="true"` attribute in your HTML tags to control the load order for CSS and JavaScript. With `data-preload=true`, the page is constructed before being shown to the user. This attribute helps prevent the page from "flickering" by preloading the CSS file, without the un-styled HTML being shown to the user. The following HTML code snippet shows the use of the `data-preload` tag.
   ```HTML
   <link href="https://path-to-your-file/sample.css" rel="stylesheet" type="text/css" data-preload="true"/>
   ```