[ci] Fix whitespace in .gitlab-ci.yml

6 jobs for master in 11 minutes and 35 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build_test #107899
linux

00:06:57

failed deb #107901
linux allowed to fail

00:00:44

passed snap #107900
linux

00:11:01

 
  Push
failed branded_push #107902

00:00:33

 
  Trigger
skipped trigger_deb #107903
 
  Vendor
skipped vendorize #107904
 
Name Stage Failure
failed
branded_push Push
No job log
failed
deb Build
No job log