Bump better_errors from 2.5.0 to 2.5.1
Bump better_errors from 2.5.0 to 2.5.1

Bumps [better_errors](https://github.com/BetterErrors/better_errors) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/BetterErrors/better_errors/releases)
- [Changelog](https://github.com/BetterErrors/better_errors/blob/master/CHANGELOG.md)
- [Commits](https://github.com/BetterErrors/better_errors/compare/v2.5.0...v2.5.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alphagov/contacts-admin,alphagov/contacts-admin,alphagov/contacts-admin