Bump mail-parser from 4.0.0 to 4.1.2 in /docker/py3-tools-ubi

Bumps [mail-parser](https://github.com/SpamScope/mail-parser) from 4.0.0 to 4.1.2.
- [Release notes](https://github.com/SpamScope/mail-parser/releases)
- [Commits](SpamScope/mail-parser@4.0.0...4.1.2)

---
updated-dependencies:
- dependency-name: mail-parser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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