Bump apps/frontend from `c5263cd` to `b921853`
Bump apps/frontend from `c5263cd` to `b921853`

Bumps [apps/frontend](https://github.com/alphagov/frontend) from `c5263cd` to `b921853`.
- [Release notes](https://github.com/alphagov/frontend/releases)
- [Commits](https://github.com/alphagov/frontend/compare/c5263cda80020e2bde52660282d4fb7a2658780d...b921853ad64609382beb9abaea8f5243457e24ef)

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