Updating GH link and autocollapse of categories

docusaurus.config.js

@@ -24,6 +24,11 @@ module.exports = {
     },
   },
   themeConfig: {
+    docs: {
+      sidebar: {
+        autoCollapseCategories: true,
+      },
+    },
     algolia: {
       // The application ID provided by Algolia
       appId: '30NEY6C9UY',
@@ -78,7 +83,7 @@ module.exports = {
           href: 'https://github.com/rancher/rancher-docs',
           label: 'GitHub',
           position: 'right',
-          className: 'navbar__github btn btn-secondary icon-github',
+          className: 'navbar__github',
         },
         {
           type: 'docsVersionDropdown',