docs: fix by adding correct filename

apps/reference/docs/guides/auth/auth-helpers/sveltekit.mdx

@@ -104,7 +104,7 @@ Edit your `+layout.svelte` file and set up the client-side.
 
 ### Set up hooks
 
-The `hooks.ts` file is where the heavy lifting of this library happens:
+The `hooks.server.ts` file is where the heavy lifting of this library happens:
 
 ```ts title="src/hooks.server.ts"
 // make sure the supabase instance is initialized on the server