Bump bleach from 3.1.1 to 3.1.2 in /requirements (#1594)
Bump bleach from 3.1.1 to 3.1.2 in /requirements (#1594)

Bumps [bleach](https://github.com/mozilla/bleach) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](https://github.com/mozilla/bleach/compare/v3.1.1...v3.1.2)

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
mathjazz/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,jotes/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,jotes/pontoon,mozilla/pontoon,mozilla/pontoon,mozilla/pontoon,mathjazz/pontoon,mathjazz/pontoon