Make the first letter of the language selector upper case (#1214)

website/src/components/LanguageSelector/LanguageSelector.tsx

@@ -20,11 +20,15 @@ const LanguageSelector = () => {
     }
   }, [cookies, setCookie, router]);
 
+  const firstLetterUppercase = (str) => {
+    return str.charAt(0).toLocaleUpperCase() + str.slice(1);
+  };
+
   // Memo the set of locales and their display names.
   const localesAndNames = useMemo(() => {
     return router.locales.map((locale) => ({
       locale,
-      name: new Intl.DisplayNames([locale], { type: "language" }).of(locale),
+      name: firstLetterUppercase(new Intl.DisplayNames([locale], { type: "language" }).of(locale)),
     }));
   }, [router.locales]);