Bump apps/identity-idp from `20552fa` to `6fdf921`
Bump apps/identity-idp from `20552fa` to `6fdf921`

Bumps [apps/identity-idp](https://github.com/18F/identity-idp) from `20552fa` to `6fdf921`.
- [Release notes](https://github.com/18F/identity-idp/releases)
- [Commits](https://github.com/18F/identity-idp/compare/20552faac3a01aa524c7a838f169297661d153f3...6fdf921dbe1268d71a63653ed430dcc270f56412)

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