build(deps): bump mail-parser from 4.3.0 to 4.4.0 in /mail (#80)

Bumps [mail-parser](https://github.com/SpamScope/mail-parser) from 4.3.0 to 4.4.0.
- [Release notes](https://github.com/SpamScope/mail-parser/releases)
- [Commits](SpamScope/mail-parser@4.3.0...4.4.0)

---
updated-dependencies:
- dependency-name: mail-parser
  dependency-version: 4.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

mail/requirements.txt

@@ -1 +1 @@
-mail-parser==4.3.0
+mail-parser==4.4.0