Bump geoip2/geoip2 from 2.13.0 to 3.0.0 in /_backend

Bumps [geoip2/geoip2](https://github.com/maxmind/GeoIP2-php) from 2.13.0 to 3.0.0.
- [Release notes](https://github.com/maxmind/GeoIP2-php/releases)
- [Changelog](https://github.com/maxmind/GeoIP2-php/blob/main/CHANGELOG.md)
- [Commits](maxmind/GeoIP2-php@v2.13.0...v3.0.0)

---
updated-dependencies:
- dependency-name: geoip2/geoip2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

_backend/composer.json

@@ -14,7 +14,7 @@
         "stripe/stripe-php": "13.8.0",
         "sentry/sdk": "^3.3.0",
         "erusev/parsedown-extra": "^0.8",
-        "geoip2/geoip2": "^2.0",
+        "geoip2/geoip2": "^3.0",
         "ext-intl": ">=7",
         "ext-json": ">=7"
     },