appVersion is outdated
https://gitlab.com/gitlab-org/gitlab-runner/-/tags has 15.7.1 but this repository still uses 15.7.0.
and since changing the image seems to be deprecated at https://gitlab.com/gitlab-org/charts/gitlab-runner/-/blob/main/values.yaml#L6, maybe a gitlab-runner release should trigger an update in this repository, to keep them in sync.