Update .gitlab-ci.yml

1 job for carpentries-style in 46 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Deploy
failed #27379
pages

00:00:46

 
Name Stage Failure
failed
pages Deploy
$ apt install python3-pip

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package python3-pip
ERROR: Job failed: exit code 1