增加音乐人签到接口；修正文档错误

module/musician_sign.js

@@ -0,0 +1,17 @@
+// 音乐人签到
+
+module.exports = (query, request) => {
+    const data = {}
+    return request(
+      'POST',
+      `https://music.163.com/weapi/creator/user/access`,
+      data,
+      {
+        crypto: 'weapi',
+        cookie: query.cookie,
+        proxy: query.proxy,
+        realIP: query.realIP,
+      },
+    )
+  }
+