Update dnspython requirement from ==2.6.* to ==2.7.* (#4511)

Updates the requirements on [dnspython](https://github.com/rthalley/dnspython) to permit the latest version.
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/main/doc/whatsnew.rst)
- [Commits](https://github.com/rthalley/dnspython/compare/v2.6.0rc1...v2.7.0)

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

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pyproject.toml

@@ -55,7 +55,7 @@ dependencies = [
   "django-scopes==2.0.*",
   "django-statici18n==2.5.*",
   "djangorestframework==3.15.*",
-  "dnspython==2.6.*",
+  "dnspython==2.7.*",
   "drf_ujson2==1.7.*",
   "geoip2==4.*",
   "importlib_metadata==8.*",  # Polyfill, we can probably drop this once we require Python 3.10+