Bump apps/speakerinnen_liste from `2018e7f` to `a7dafe4`
Bump apps/speakerinnen_liste from `2018e7f` to `a7dafe4`

Bumps [apps/speakerinnen_liste](https://github.com/rubymonsters/speakerinnen_liste) from `2018e7f` to `a7dafe4`.
- [Release notes](https://github.com/rubymonsters/speakerinnen_liste/releases)
- [Commits](https://github.com/rubymonsters/speakerinnen_liste/compare/2018e7f04990edd2a0a3579febef3044b0f7680a...a7dafe42bae06d6aa95c3fb100ea6a7dfd745ab1)

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