workspace: update contact info

packages/hydrooj/package.json

@@ -5,7 +5,7 @@
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
     "repository": "https://github.com/hydro-dev/Hydro.git",
-    "author": "masnn",
+    "author": "undefined <i@undefined.moe>",
     "license": "AGPL-3.0-only",
     "engines": {
         "node": ">=10.10"