通过miniprogram-ci 调用preview upload时，经常上传失败。周五失败频率更高。

上传请求如下：

request url: https://servicewechat.com/wxa/ci/testSourceURL?codeprotect=0&type=miniProgram&appid=wxffb7d80f8c50ac5c&version=0.0.1&desc=%E5%BC%80%E5%8F%91%E7%89%88-%E5%BC%80%E5%8F%91%E7%89%88&robot=2&path=pages%2Fhome%2Fhome%3Fa%3D1&debugLaunchInfo=%7B%22scene%22%3A1011%2C%22path%22%3A%22pages%2Fhome%2Fhome%22%2C%22query%22%3A%7B%22a%22%3A%221%22%7D%7D

错误日志如下：

Error: {"errCode":-1,"errMsg":"inner test source fail statusCode: 503"}

at innerUpload (/usr/lib/node_modules/@jd/minici/node_modules/miniprogram-ci/dist/ci/upload.js:1:3517) at processTicksAndRejections (internal/process/task_queues.js:93:5) at async preview (/usr/lib/node_modules/@jd/minici/node_modules/miniprogram-ci/dist/ci/preview.js:1:977) at async Object.preview (/usr/lib/node_modules/@jd/minici/node_modules/miniprogram-ci/dist/utils/report.js:1:1403)