Bump better_errors from 2.5.1 to 2.6.0
Bump better_errors from 2.5.1 to 2.6.0

Bumps [better_errors](https://github.com/BetterErrors/better_errors) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/BetterErrors/better_errors/releases)
- [Commits](https://github.com/BetterErrors/better_errors/compare/v2.5.1...v2.6.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
alphagov/finder-frontend,alphagov/finder-frontend,alphagov/finder-frontend,alphagov/finder-frontend