[docs] Fix bug in upgradenotes sidebar entry

Author: andrewnicols

Diff for: sidebars/general.js

@@ -125,17 +125,8 @@ const sidebars = {
         },
         {
             label: 'Upgrade notes',
-            type: 'category',
-            items: [
-                {
-                    type: 'autogenerated',
-                    dirName: 'development/upgradenotes',
-                },
-            ],
-            link: {
-                type: 'doc',
-                id: 'development/upgradenotes',
-            },
+            type: 'doc',
+            id: 'development/upgradenotes',
         },
     ],