Bump mongo from 2.13.0 to 2.13.1
Bump mongo from 2.13.0 to 2.13.1

Bumps [mongo](https://github.com/mongodb/mongo-ruby-driver) from 2.13.0 to 2.13.1.
- [Release notes](https://github.com/mongodb/mongo-ruby-driver/releases)
- [Commits](https://github.com/mongodb/mongo-ruby-driver/compare/v2.13.0...v2.13.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
alphagov/router-api,alphagov/router-api