gitlab-ci: Increase GIT_DEPTH to 200

This branch has lots of tiny commits, so pipeline refuses it.
Let's bump the git depth more.

GNOME/gnome-shell!559
4 jobs for !559 with this.actor-removal in 3 minutes and 31 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Review
passed #326401
check_commit_log

00:00:29

 
  Build
passed #326402
build

00:02:07

 
  Test
passed #326403
test

00:00:51

passed #326404
test-pot

00:00:54