Fix linter warning for typed querySelector usage

Co-authored-by: fregante <1402241+fregante@users.noreply.github.com>

Author: Copilot

index.ts

@@ -1,6 +1,7 @@
 import reservedNames from 'github-reserved-names/reserved-names.json' with {type: 'json'};
 import {addTests} from './collector.ts';
 
+// eslint-disable-next-line @typescript-eslint/no-deprecated -- Intentionally using typed querySelector
 const $: typeof document.querySelector = <E extends Element = Element>(selector: string) => document.querySelector<E>(selector);
 const exists = (selector: string): boolean => Boolean(document.querySelector(selector));