Merge branch 'renovate/customizable-dashboards-packages' into 'master'

Update dependency gridstack to ^8.4.0

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/127225



Merged-by: Robert Hunt <rhunt@gitlab.com>
Approved-by: Jiaan Louw <3468028-jiaan@users.noreply.gitlab.com>
Approved-by: Robert Hunt <rhunt@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>