fixed ci script

1 job for master in 6 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
failed build-wheel #1613

00:00:06

 
Name Stage Failure
failed
build-wheel Build
Running with gitlab-runner 12.9.0 (4c96e5ad)
on HEL2 9b794135
Preparing the "docker" executor
Using Docker executor with image python3.7 ...
Pulling docker image python3.7 ...
ERROR: Job failed: Error response from daemon: repository python3.7 not found: does not exist or no pull access (docker.go:196:1s)