Address review feedback: GeoIP branding in docs

Update the remaining product-prose 'GeoIP2' reference to 'GeoIP'.
Technical identifiers (class names, package coordinates) are unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: oschwald

CLAUDE.md

@@ -68,7 +68,7 @@ mvn javadoc:javadoc
 - Use Java records (as of version 4.0.0) with deprecated getter methods for backwards compatibility
 - Implement `JsonSerializable` interface
 - `InsightsResponse` and `FactorsResponse` extend `ScoreResponse` with additional fields
-- Response models include GeoIP2 data (this library depends on `com.maxmind.geoip2:geoip2`)
+- Response models include GeoIP data (this library depends on `com.maxmind.geoip2:geoip2`)
 
 **Exception Hierarchy** (`src/main/java/com/maxmind/minfraud/exception/`)
 - `MinFraudException` (base checked exception)