docs: show compacted menu (#12)

hugo.toml

@@ -138,7 +138,7 @@ navbar_logo = true
 # Set to true if you don't want the top navbar to be translucent when over a `block/cover`, like on the homepage.
 navbar_translucent_over_cover_disable = false
 # Enable to show the side bar menu in its compact state.
-sidebar_menu_compact = false
+sidebar_menu_compact = true
 # Set to true to hide the sidebar search box (the top nav search box will still be displayed if search is enabled)
 sidebar_search_disable = false