message: fix(theme): fix homepage feature external links
diff: import { usePageFrontmatter, withBase } from "@vuepress/client";
  -import { isArray, isLinkHttp } from "@vuepress/shared";
  +import { isArray, isLinkExternal, isLinkHttp } from "@vuepress/shared";
  import { computed, defineComponent, h } from "vue";
  import { RouterLink } from "vue-router";
  @@ -48,7 +48,18 @@ export default defineComponent({
  ];
  return feature.link
  + ? isLinkExternal(feature.link)
  ? h(
  + "a",
  + {
  + class: "feature link",
  + href: feature.link,
  + role: "navigation",
  + target: "_blank",
  + },
  + children
  + )
  + : h(
  RouterLink,
  {
  class: "feature link",
  