fixed naming of deploy stage as 'pages' in .gitlab-ci.yml

6 jobs for mohr in 3 minutes and 30 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
passed unittests_debian_10 #433737

00:02:35

83.0%
passed unittests_debian_latest #433738

00:02:48

83.0%
passed unittests_ubuntu_1804 #433739

00:02:09

83.0%
passed unittests_ubuntu_2004 #433740

00:02:38

83.0%
 
  Deploy
passed pages #433741

00:00:41

passed pages:deploy

00:00:00