update thumb for vercel post

apps/www/_blog/2023-08-10-using-supabase-with-vercel.mdx

@@ -9,8 +9,8 @@ date: '2023-08-10'
 published_at: '2023-08-10T09:00:00.000-07:00'
 toc_depth: 3
 author: jonny
-image: launch-week-8/day-3/og-day3.jpg
-thumb: launch-week-8/day-3/thumb-day3.jpg
+image: launch-week-8/day-4/vercel-and-supabase-og.jpg
+thumb: launch-week-8/day-4/vercel-and-supabase-thumb.jpg
 ---
 
 Vercel's open source framework, [Next.js](https://nextjs.org/), is the most popular choice of frontend framework when developing an app with Supabase.