Update drf-ujson2 requirement from ==1.7.* to ==1.8.*

Updates the requirements on [drf-ujson2](https://github.com/Amertz08/drf_ujson2) to permit the latest version.
- [Release notes](https://github.com/Amertz08/drf_ujson2/releases)
- [Changelog](https://github.com/Amertz08/drf_ujson2/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Amertz08/drf_ujson2/compare/v1.7.0.alpha1...v1.8.0)

---
updated-dependencies:
- dependency-name: drf-ujson2
  dependency-type: direct:production
...

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

pyproject.toml

@@ -56,7 +56,7 @@ dependencies = [
   "django-statici18n==2.6.*",
   "djangorestframework==3.15.*",
   "dnspython==2.7.*",
-  "drf_ujson2==1.7.*",
+  "drf_ujson2==1.8.*",
   "geoip2==4.*",
   "importlib_metadata==8.*",  # Polyfill, we can probably drop this once we require Python 3.10+
   "isoweek",