Bump apps/publisher from `8f4c3af` to `18d3436`
Bump apps/publisher from `8f4c3af` to `18d3436`

Bumps [apps/publisher](https://github.com/alphagov/publisher) from `8f4c3af` to `18d3436`.
- [Release notes](https://github.com/alphagov/publisher/releases)
- [Commits](https://github.com/alphagov/publisher/compare/8f4c3afd0c0f28b6e424a46a09d36d6bf5ba5e12...18d3436de2cab5dcdb0e300dcf92bf416054e1f1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
eliotsykes/real-world-rails