Refactor MainMenu suspense boundary

components/Header/index.tsx

@@ -11,7 +11,7 @@ import TopMenu, { TopMenuSkeleton } from "./TopMenu"
 
 import styles from "./header.module.css"
 
-export default function Header() {
+export default async function Header() {
   void getHeader()
   void getLanguageSwitcher()
   void getName()
@@ -21,9 +21,7 @@ export default function Header() {
       <Suspense fallback={<TopMenuSkeleton />}>
         <TopMenu />
       </Suspense>
-      <Suspense fallback="Loading main menu">
-        <MainMenu />
-      </Suspense>
+      <MainMenu />
     </header>
   )
 }