ui: markdown: add support for @[bilibili](BVxxx)

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.37.9",
+  "version": "4.37.10",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
@@ -24,6 +24,7 @@
     "@types/jquery": "^3.5.14",
     "@types/json-schema": "^7.0.11",
     "@types/katex": "^0.14.0",
+    "@types/markdown-it": "^12.2.3",
     "@types/qrcode": "^1.4.2",
     "@types/react-dom": "^18.0.4",
     "@types/redux-logger": "^3.0.9",