Bump apps/discourse from `36e0e6a` to `21e8a33`
Bump apps/discourse from `36e0e6a` to `21e8a33`

Bumps [apps/discourse](https://github.com/discourse/discourse) from `36e0e6a` to `21e8a33`.
- [Release notes](https://github.com/discourse/discourse/releases)
- [Commits](https://github.com/discourse/discourse/compare/36e0e6a322aaf768ac79c539d85f202de01fd231...21e8a33177047e69f25c7103480c06ba8e23d01c)

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