[feat] support giscus self-hosting

_config.yml

@@ -107,6 +107,7 @@ comments:
   # giscus
   # https://giscus.app/zh-CN
   giscus:
+    src: https://giscus.app/client.js
     data-repo: xxx/xxx # [在此输入仓库]
     data-repo-id: # [在此输入仓库 ID]
     data-category: # [在此输入分类名]

layout/_partial/plugins/comments/giscus/script.ejs

@@ -9,7 +9,6 @@
         console.error(error);
       }
       var script = document.createElement('script');
-      script.src = 'https://giscus.app/client.js';
       script.async = true;
       for (let key of Object.keys(el.attributes)) {
         let attr = el.attributes[key];