add vercel adapter

svelte.config.js

@@ -1,4 +1,4 @@
-import adapter from '@sveltejs/adapter-auto';
+import adapter from '@sveltejs/adapter-vercel';
 import { vitePreprocess } from '@sveltejs/kit/vite';
 
 /** @type {import('@sveltejs/kit').Config} */
@@ -8,9 +8,6 @@ const config = {
 	preprocess: vitePreprocess(),
 
 	kit: {
-		// adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
-		// If your environment is not supported or you settled on a specific environment, switch out the adapter.
-		// See https://kit.svelte.dev/docs/adapters for more information about adapters.
 		adapter: adapter()
 	}
 };