Bump apps/whitehall from `c51d77b` to `e5455af`
Bump apps/whitehall from `c51d77b` to `e5455af`

Bumps [apps/whitehall](https://github.com/alphagov/whitehall) from `c51d77b` to `e5455af`.
- [Release notes](https://github.com/alphagov/whitehall/releases)
- [Commits](https://github.com/alphagov/whitehall/compare/c51d77b6bc5e49ee6a85d3942b433f4ba2242213...e5455afecff1d97229626e02010ffb891ebcfe02)

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