Bump apps/signonotron2 from `dd5abff` to `281d997`
Bump apps/signonotron2 from `dd5abff` to `281d997`

Bumps [apps/signonotron2](https://github.com/alphagov/signonotron2) from `dd5abff` to `281d997`.
- [Release notes](https://github.com/alphagov/signonotron2/releases)
- [Commits](https://github.com/alphagov/signonotron2/compare/dd5abffabc5a48392a76af353d5204e347935ce2...281d9976d1bddfc8cb91b8218d3238e29107b5e5)

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