Merge branch 'renovate-gems/icalendar' into 'master'

Update dependency icalendar to v2.10.3

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/166819



Merged-by: Lukas Eipert <leipert@gitlab.com>
Approved-by: Ameya Darshan <adarshan@gitlab.com>
Approved-by: Lukas Eipert <leipert@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>