Fix broken link

docusaurus.config.ts

@@ -177,7 +177,7 @@ const config: Config = {
             },
             {
               label: 'Reservations',
-              href: '/docs/reservations',
+              href: '/reservations',
             },
             {
               label: 'Attendance list',
@@ -194,7 +194,7 @@ const config: Config = {
           items: [
             {
               label: 'Authors',
-              href: '/docs/authors',
+              href: '/authors',
             },
           ],
         },