Update .gitlab-ci.yml

2 jobs for gh-pages in 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #14028
test

00:00:12

 
  Deploy
skipped #14029
pages
 
Name Stage Failure
failed
test Test
From https://gitext.gfz-potsdam.de/swc-bb/pages/2019-11-26-Potsdam-Berlin-Python
0f24d6d..e757f18 gh-pages -> origin/gh-pages
Checking out e757f18f as gh-pages...
Removing .bundle/

Skipping Git submodules setup
$ bundle install
Could not locate Gemfile
ERROR: Job failed: exit code 1