Bump govuk_elements_rails from 3.1.0 to 3.1.2 (#1129)
Bump govuk_elements_rails from 3.1.0 to 3.1.2 (#1129)

Bumps [govuk_elements_rails](https://github.com/alphagov/govuk_elements_rails) from 3.1.0 to 3.1.2.
- [Commits](https://github.com/alphagov/govuk_elements_rails/compare/v3.1.0...v3.1.2)
ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2