Bump apps/discourse from `dec7e19` to `c39ab6c`
Bump apps/discourse from `dec7e19` to `c39ab6c`

Bumps [apps/discourse](https://github.com/discourse/discourse) from `dec7e19` to `c39ab6c`.
- [Release notes](https://github.com/discourse/discourse/releases)
- [Commits](https://github.com/discourse/discourse/compare/dec7e19da3b8be1fbbd86575f0609436e87a183c...c39ab6c0ae3803b6a62501954ae40adb6b73d580)

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