chore(deps): update dnspython requirement in /api

Updates the requirements on [dnspython](https://github.com/rthalley/dnspython) to permit the latest version.
- [Changelog](https://github.com/rthalley/dnspython/blob/master/doc/whatsnew.rst)
- [Commits](https://github.com/rthalley/dnspython/compare/v2.3.0...v2.4.1)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-type: direct:production
...

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

api/requirements.txt

@@ -9,7 +9,7 @@ django-celery-email~=3.0.0
 django-netfields~=1.3.0
 django-pgtrigger~=4.7.0
 django-prometheus~=2.3.1
-dnspython~=2.3.0
+dnspython~=2.4.1
 httpretty~=1.0.5  # 1.1 breaks tests. Does not run in production, so stick to it.
 Pillow~=9.5.0  # added to control captcha's dependency version, https://github.com/lepture/captcha/issues/63
 pyotp~=2.8.0