开启评论区：暂时无权限打开 discussions，使用 kern-crates/hugo-book-template 的

Author: zjp-CN

layouts/partials/docs/comments.html

@@ -0,0 +1,5 @@
+<script src="https://giscus.app/client.js" data-repo="kern-crates/hugo-book-template" data-repo-id="R_kgDOOxvcIg"
+  data-category="General" data-category-id="DIC_kwDOOxvcIs4CqrEs" data-mapping="pathname" data-strict="0"
+  data-reactions-enabled="1" data-emit-metadata="0" data-input-position="top" data-theme="preferred_color_scheme"
+  data-lang="zh-CN" data-loading="lazy" crossorigin="anonymous" async>
+  </script>