fix(Docs): Broken graphql page and missing navigation (#43965)

apps/docs/components/Navigation/NavigationMenu/NavigationMenu.constants.ts

@@ -1547,6 +1547,11 @@ export const graphql: NavMenuConstant = {
     { name: 'API', url: '/guides/graphql/api', items: [] },
     { name: 'Views', url: '/guides/graphql/views', items: [] },
     { name: 'Functions', url: '/guides/graphql/functions', items: [] },
+    {
+      name: 'Computed Fields',
+      url: '/guides/graphql/computed-fields',
+      items: [],
+    },
     {
       name: 'Configuration & Customization',
       url: '/guides/graphql/configuration',