docs(xo6): hide categories that dont contain any actual pages (#10066)

Recently we've introduced new sections for the xo6 category of the XO doc.
These categories were meant to be filled later with new pages.
The pages were created as placeholders, but didn't actually contain any text, just titles.
These made readers confused, so this commit
Hides the sections from the sidebar until we update them
With actual content.

Signed-off-by: Thomas Moraine <thomas.moraine@vates.tech>

docs/sidebars.ts

@@ -44,6 +44,7 @@ export default {
       collapsible: true,
       collapsed: false,
       items:[
+        /* These categories are hidden until they no longer only contain blank pages
         {
           type: 'category',
           label: 'What\'s new in XO6',
@@ -90,6 +91,7 @@ export default {
             'xo6/backups',
           ],
         },
+        */
         {
           type: 'category',
           label: 'Security',