judge: use config[key]

packages/hydrojudge/package.json

@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.20.3",
+    "version": "2.20.4",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",

packages/hydrojudge/src/config.ts

@@ -33,7 +33,7 @@ HOME=/w`,
 };
 
 export function getConfig(key: keyof typeof config) {
-    return global.Hydro ? global.Hydro.model.system.get(`hydrojudge.${key}`) : config[key];
+    return global.Hydro ? global.Hydro.model.system.get(`hydrojudge.${key}`) ?? config[key] : config[key];
 }
 
 if (fs.existsSync(path.resolve(process.cwd(), '.env'))) {