Bump html5lib from 1.0.1 to 1.1 in /requirements
Bump html5lib from 1.0.1 to 1.1 in /requirements

Bumps [html5lib](https://github.com/html5lib/html5lib-python) from 1.0.1 to 1.1.
- [Release notes](https://github.com/html5lib/html5lib-python/releases)
- [Changelog](https://github.com/html5lib/html5lib-python/blob/master/CHANGES.rst)
- [Commits](https://github.com/html5lib/html5lib-python/compare/1.0.1...1.1)

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