chore: modify gitlab-ci

Author: ZStack-Robot

.gitlab-ci.yml

@@ -20,6 +20,7 @@ before_script:
   - "export http_proxy=http://zstack.one:8888"
   - "export https_proxy=http://zstack.one:8888"
   - "export no_proxy=localhost,127.0.0.1,::1"
+  - "- go env -w GOPROXY=https://goproxy.cn,direct"
 
 build_job:
   stage: build