Merge branch 'renovate/alpine-3.x' into 'master'

chore(deps): update alpine docker tag to v3.18.4

See merge request https://gitlab.com/gitlab-org/terraform-images/-/merge_requests/232



Merged-by: Timo Furrer <tfurrer@gitlab.com>
Approved-by: Timo Furrer <tfurrer@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>