Bump kinto-attachment from 6.0.4 to 6.1.0
Bump kinto-attachment from 6.0.4 to 6.1.0

Bumps [kinto-attachment](https://github.com/Kinto/kinto-attachment) from 6.0.4 to 6.1.0.
- [Release notes](https://github.com/Kinto/kinto-attachment/releases)
- [Changelog](https://github.com/Kinto/kinto-attachment/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/Kinto/kinto-attachment/compare/6.0.4...6.1.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Kinto/kinto-dist,Kinto/kinto-dist,mozilla-services/kinto-dist,mozilla-services/kinto-dist