[Docs] device mode in devtools docs topnav

chrome/common/extensions/docs/templates/json/chrome_sidenav.json

 [
   {
     "title": "Devtools",
     "items": [
       {
         "title": "Learn Basics",
         "items": [
           {
             "title": "Overview",
             "href": "/devtools/index"
@@ skipping 53 matching lines @@
                 "title": "Managing Application Storage",
                 "href": "/devtools/docs/resource-panel"
               }
             ]
           },
           {
             "title": "Debugging JavaScript",
             "href": "/devtools/docs/javascript-debugging"
           },
           {
-            "title": "Mobile Emulation",
-            "href": "/devtools/docs/mobile-emulation"
+            "title": "Device Mode & Mobile Emulation",
+            "href": "/devtools/docs/device-mode"
           },
           {
             "title": "Remote Debugging on Android",
             "href": "/devtools/docs/remote-debugging"
           },
           {
             "title": "Saving Changes with Workspaces",
             "href": "/devtools/docs/workspaces"
           }
         ]
@@ skipping 935 matching lines @@
                 "title": "Articles",
                 "href": "/webstore/articles"
               }
             ]
           }
         ]
       }
     ]
   }
 ]