Update dependency kubectl to v1.30.1

See merge request https://gitlab.com/gitlab-org/build/CNG/-/merge_requests/1799



Merged-by: Robert Marshall <rmarshall@gitlab.com>
Approved-by: Jason Plum <jplum@gitlab.com>
Approved-by: Robert Marshall <rmarshall@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>