fix(docs): make docs accurate to callout behaviour (closes #920)

Jacky Zhao

2024-02-23 be9b6b3a1e2038ea0a985ebd37fb18a661bddd04

 index.d.ts

@@ -6,6 +6,7 @@
// dom custom event
interface CustomEventMap {
  nav: CustomEvent<{ url: FullSlug }>
  themechange: CustomEvent<{ theme: "light" | "dark" }>
}

declare const fetchData: Promise<ContentIndex>