Bump apps/whitehall from `ba809c0` to `90790d4`
Bump apps/whitehall from `ba809c0` to `90790d4`

Bumps [apps/whitehall](https://github.com/alphagov/whitehall) from `ba809c0` to `90790d4`.
- [Release notes](https://github.com/alphagov/whitehall/releases)
- [Commits](https://github.com/alphagov/whitehall/compare/ba809c0ff025d51892a8d3fd02986b59061c9f9e...90790d473f96a63de83428e318aa5276a7d39b9f)

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