chore(deps): bump bleach from 3.1.0 to 3.1.1 in /python

Bumps [bleach](https://github.com/mozilla/bleach) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](mozilla/bleach@v3.1.0...v3.1.1)

Signed-off-by: dependabot[bot] <[email protected]>