Add how to have a jitsi & cowebsite on doc

docs/maps/api-nav.md

@@ -67,7 +67,7 @@ const coWebsiteWorkAdventure = await WA.nav.openCoWebSite('https://workadventu.r
 coWebsite.close();
 ```
 
-### Opening/closing web page in Co-Websites
+### Get all Co-Websites
 
 ```
 WA.nav.getCoWebSites(): Promise<CoWebsite[]>

docs/maps/opening-a-website.md

@@ -64,3 +64,13 @@ For instance, if you want an iFrame to be able to go in fullscreen, you will use
     <img src="images/open_website_policy.jpg" class="figure-img img-fluid rounded" alt="" />
     <figcaption class="figure-caption">The generated iFrame will have the allow attribute set to: <code>&lt;iframe allow="fullscreen"&gt;</code></figcaption>
 </figure>
+
+### Open a Jitsi with a co-website
+
+Cowebsites allow you to have several sites open at the same time.
+
+If you want to open a Jitsi and another page it's easy!
+
+You have just to [add a Jitsi to the map](meeting-rooms.md) and [add a co-website](opening-a-website.md#the-openwebsite-property) on the same layer.
+
+It's done!