Bump apps/signonotron2 from `0fb4fc5` to `9664627`
Bump apps/signonotron2 from `0fb4fc5` to `9664627`

Bumps [apps/signonotron2](https://github.com/alphagov/signonotron2) from `0fb4fc5` to `9664627`.
- [Release notes](https://github.com/alphagov/signonotron2/releases)
- [Commits](https://github.com/alphagov/signonotron2/compare/0fb4fc567436662f42016b6cf4b465be9c3f9f87...9664627d3b55dd2185ca12360597844f15a91da3)

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