Increase expectations for fix to #15819

one of the cases we CAN hydrate

Author: Jan Vogt

packages/svelte/tests/hydration/samples/cloudflare-mirage-borking-2/_config.js

@@ -1,4 +1,5 @@
 <script>
+	// https://github.com/sveltejs/svelte/issues/15819
 	const cond = true;
 </script>