Bump pytest-html from 1.21.0 to 1.21.1 (#5080)
Bump pytest-html from 1.21.0 to 1.21.1 (#5080)

Bumps [pytest-html](https://github.com/pytest-dev/pytest-html) from 1.21.0 to 1.21.1.
- [Release notes](https://github.com/pytest-dev/pytest-html/releases)
- [Changelog](https://github.com/pytest-dev/pytest-html/blob/master/CHANGES.rst)
- [Commits](https://github.com/pytest-dev/pytest-html/compare/v1.21.0...v1.21.1)

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