Bump apps/wiki_edu_dashboard from `18f815b` to `838f4a7`
Bump apps/wiki_edu_dashboard from `18f815b` to `838f4a7`

Bumps [apps/wiki_edu_dashboard](https://github.com/WikiEducationFoundation/WikiEduDashboard) from `18f815b` to `838f4a7`.
- [Release notes](https://github.com/WikiEducationFoundation/WikiEduDashboard/releases)
- [Commits](https://github.com/WikiEducationFoundation/WikiEduDashboard/compare/18f815b0eb7b756c397457a8d6b0d5ae04c5375c...838f4a770291705496b1e11a4bdffb76f5869b1c)

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