fix: url extname with ? signature

server/lib/docs/index.js

@@ -169,6 +169,7 @@ export async function downloadUrl(url,options) {
         // 文件名转MD5
         let md5 = crypto.createHash('md5');
         let extname = path.extname(url)?.toLocaleLowerCase();
+        extname = extname?.split("?")?.[0]
         filename = md5.update(url).digest('hex') + extname;
     }