message: docs: load new ads on new page
diff: <Home v-if="$page.frontmatter.home" />
  - <Ad />
  + <Ad :key="$route.path" />
  <Page v-if="!$page.frontmatter.home" :sidebar-items="sidebarItems">
  <slot name="page-top" slot="top" />
  <slot name="page-bottom" slot="bottom" />
  