fix: update import statement in next-env.d.ts to use .d.ts extension

Author: https-richardy

Web/Landing/next-env.d.ts

@@ -1,6 +1,7 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.js";
+
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.