⬆ Bump email-validator from 2.2.0 to 2.3.0 in /backend (#1850)

Bumps [email-validator](https://github.com/JoshData/python-email-validator) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/JoshData/python-email-validator/releases)
- [Changelog](https://github.com/JoshData/python-email-validator/blob/main/CHANGELOG.md)
- [Commits](JoshData/python-email-validator@v2.2.0...v2.3.0)

---
updated-dependencies:
- dependency-name: email-validator
  dependency-version: 2.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]