Update CI example docs for python deploy
What does this MR do?
I was following the example CI docs to python deploys, and the provided gitlab-runner
command failed for me. After some digging, I found the provided flag --docker-postgres latest
is no longer supported by gitlab-runner (12.5.0) and instead should use the --docker-services
flag. Updates the example gitlab-runner command to reflect this.
Review checklist
All reviewers can help ensure accuracy, clarity, completeness, and adherence to the Documentation Guidelines and Style Guide.