Bump apps/whitehall from `1729445` to `68cfaa8`
Bump apps/whitehall from `1729445` to `68cfaa8`

Bumps [apps/whitehall](https://github.com/alphagov/whitehall) from `1729445` to `68cfaa8`.
- [Release notes](https://github.com/alphagov/whitehall/releases)
- [Commits](https://github.com/alphagov/whitehall/compare/17294450a67ee71bde79d27787e82ba650b415f5...68cfaa885826ef8e79a8e6e3d4d05dffcfdf26c6)

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