refactor: Update og route to use async function for GET request

src/app/api/og/route.tsx

@@ -1,7 +1,7 @@
 import { ImageResponse } from "next/og";
 import { NextRequest } from "next/server";
 
-export default function handler(req: NextRequest) {
+export async function GET(req: NextRequest) {
   const { searchParams } = new URL(req.url);
   const title = searchParams.get("title");
   const logo = searchParams.get("logo");