Update GitLab Runner to v15.8.2
What does this MR do?
Adds a missing GitLab Runner version bump to match https://ops.gitlab.net/gitlab-com/gl-infra/ci-infrastructure-windows/-/merge_requests/98.
Why was this MR needed?
What's the best way to test this MR?
What are the relevant issue numbers?
Edited by Alex Hanselka