Update markdown.tsx

Add _self or _blank renderers for links

app/components/markdown.tsx

@@ -98,12 +98,8 @@ export function Markdown(
           }}
             renderers={{
               link: (props) => {
-                // 判断链接是否为内部地址
                 const isInternal = /^\/(?!\/)/.test(props.href);
-
-                // 如果是内部地址，使用_self，否则使用_blank
                 const target = isInternal ? "_self" : "_blank";
-
                 return <a {...props} target={target} />;
               },
             }}