Revert "Bump prometheus_exporter from 0.4.17 to 0.5.1"
Revert "Bump prometheus_exporter from 0.4.17 to 0.5.1"

ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public,ministryofjustice/prison-visits-public