added translation to NavBar

01-frontend/public/locales/de/translation.json

@@ -42,6 +42,7 @@
   "lastName": "Nachname",
   "lightMode": "Zu hellem Modus wechseln",
   "logout": "Ausloggen",
+  "menu": "Menü",
   "myAccount": "Mein Konto",
   "myOrders": "Meine Bestellungen",
   "name": "Name",

01-frontend/public/locales/en/translation.json

@@ -42,6 +42,7 @@
   "lastName": "Last name",
   "lightMode": "Zu hellem Modus wechseln",
   "logout": "Logout",
+  "menu": "Menu",
   "myAccount": "My Account",
   "myOrders": "My Orders",
   "name": "Name",

01-frontend/src/helper/navbar/NavBar.tsx

@@ -242,7 +242,7 @@ export default function NavBar() {
                         <Box sx={{ display: { xs: "flex", md: "none" } }}>
                             <IconButton
                                 size="large"
-                                aria-label="menu"
+                                aria-label={t('menu')}
                                 onClick={handleOpenNavMenu}
                                 color="inherit"
                             >