Bump version to 12.1.1
To release https://gitlab.com/gitlab-org/gitlab-exporter/-/merge_requests/186 which blocks gitlab-org/build/CNG!1278 (merged)
Edited by Matthias Käppler
To release https://gitlab.com/gitlab-org/gitlab-exporter/-/merge_requests/186 which blocks gitlab-org/build/CNG!1278 (merged)