Revert "Use adapter-static instead"

This reverts commit 7d58d44971.

Looks like this doesn't work with Vercel and I cba to debug

svelte.config.js

@@ -1,6 +1,6 @@
 import { mdsvex } from "mdsvex";
 import mdsvexConfig from "./mdsvex.config.js";
-import adapter from "@sveltejs/adapter-static";
+import adapter from "@sveltejs/adapter-auto";
 import preprocess from "svelte-preprocess";
 
 /** @type {import('@sveltejs/kit').Config} */