fix: fix markdown-it type imports

src/app/(ui)/markdown/md.ts

@@ -2,8 +2,6 @@
  * Initially copied from github.com/LemmyNet/lemmy-ui with small modifications
  */
 
-import MarkdownIt from "markdown-it";
-
 import markdown_it_container from "markdown-it-container";
 // @ts-ignore
 import markdown_it_bidi from "markdown-it-bidi";
@@ -15,8 +13,9 @@ import markdown_it_sub from "markdown-it-sub";
 // @ts-ignore
 import markdown_it_sup from "markdown-it-sup";
 import markdown_it_highlightjs from "markdown-it-highlightjs";
-import Renderer from "markdown-it/lib/renderer";
-import Token from "markdown-it/lib/token";
+import Token from "markdown-it/lib/token.mjs";
+import Renderer from "markdown-it/lib/renderer.mjs";
+import MarkdownIt from "markdown-it";
 
 const instanceLinkRegex =
   /(\/[cmu]\/|!)[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/g;