Bump mailchecker from 6.0.1 to 6.0.4

Bumps [mailchecker](https://github.com/FGRibreau/mailchecker) from 6.0.1 to 6.0.4.
- [Changelog](https://github.com/FGRibreau/mailchecker/blob/master/CHANGELOG.md)
- [Commits](FGRibreau/mailchecker@v6.0.1...v6.0.4)

---
updated-dependencies:
- dependency-name: mailchecker
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -1,7 +1,7 @@
 beautifulsoup4 == 4.12.3
 boto3 == 1.34.75
 ftfy == 6.2.0
-mailchecker == 6.0.1
+mailchecker == 6.0.4
 openpyxl == 3.1.2
 phonenumbers == 8.13.33
 python-dateutil == 2.9.0