Update .gitlab-ci.yml

1 job for master in 37 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Deploy
failed #129797
pages

00:00:37

 
Name Stage Failure
failed
pages Deploy
build succeeded, 80 warnings.

The HTML pages are in public.
$ mv public/Docs/* public/
$ mv .doctrees/Docs/* .doctrees/
mv: can't rename '.doctrees/Docs/*': No such file or directory
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1