Bump zope-interface from 4.6.0 to 4.7.1 in /requirements (#5905)
Bump zope-interface from 4.6.0 to 4.7.1 in /requirements (#5905)

Bumps [zope-interface](https://github.com/zopefoundation/zope.interface) from 4.6.0 to 4.7.1.
- [Release notes](https://github.com/zopefoundation/zope.interface/releases)
- [Changelog](https://github.com/zopefoundation/zope.interface/blob/master/CHANGES.rst)
- [Commits](https://github.com/zopefoundation/zope.interface/compare/4.6.0...4.7.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
KWierso/treeherder,KWierso/treeherder,KWierso/treeherder,KWierso/treeherder