Update geoip2 requirement from ==4.* to ==5.*

Updates the requirements on [geoip2](https://github.com/maxmind/GeoIP2-python) to permit the latest version.
- [Release notes](https://github.com/maxmind/GeoIP2-python/releases)
- [Changelog](https://github.com/maxmind/GeoIP2-python/blob/main/HISTORY.rst)
- [Commits](https://github.com/maxmind/GeoIP2-python/compare/v4.0.0...v5.0.1)

---
updated-dependencies:
- dependency-name: geoip2
  dependency-type: direct:production
...

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

pyproject.toml

@@ -57,7 +57,7 @@ dependencies = [
   "djangorestframework==3.15.*",
   "dnspython==2.7.*",
   "drf_ujson2==1.7.*",
-  "geoip2==4.*",
+  "geoip2==5.*",
   "importlib_metadata==8.*",  # Polyfill, we can probably drop this once we require Python 3.10+
   "isoweek",
   "jsonschema",