Merge branch 'renovate-qa/gitlab-development-kit-digest' into 'master'

Update gitlab-development-kit digest to 2b0bf1f6

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/164286



Merged-by: Tiffany Rea <trea@gitlab.com>
Approved-by: Tiffany Rea <trea@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>

qa/gdk/Dockerfile.gdk

-ARG GDK_SHA=9d28846535331fae67117bd94aa541e51a154b0d
+ARG GDK_SHA=2b0bf1f634ea2e58586470ba114b507d8f51cb16
 # Use tag prefix when running on 'stable' branch to make sure 'protected' image is used which is not deleted by registry cleanup
 ARG GDK_BASE_TAG_PREFIX