Replace removed PropertyNamingStrategy constants for Jackson 2.20+ compat

Jackson 2.20 removed PropertyNamingStrategy.SNAKE_CASE / LOWER_CAMEL_CASE.
Switch to PropertyNamingStrategies (available since 2.12). Bump version 6.0.4 -> 6.0.5.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: engrams-agent[bot]

pom.xml

@@ -5,7 +5,7 @@
 	<groupId>org.gitlab4j</groupId>
 	<artifactId>gitlab4j-api-cortex</artifactId>
 	<packaging>jar</packaging>
-	<version>6.0.4</version>
+	<version>6.0.5</version>
 	<name>GitLab4J-API - GitLab API Java Client</name>
 	<description>GitLab4J-API (gitlab4j-api) provides a full featured Java client library for working with GitLab repositories and servers via the GitLab REST API.</description>
 	<url>https://github.com/gitlab4j/gitlab4j-api</url>

src/main/java/org/gitlab4j/api/utils/JacksonJson.java

@@ -33,7 +33,7 @@
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.module.SimpleModule;
@@ -59,7 +59,7 @@ public JacksonJson() {
         objectMapper = new ObjectMapper();
 
         objectMapper.setSerializationInclusion(Include.NON_NULL);
-        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
+        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE);
 
         objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
         objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
@@ -349,7 +349,7 @@ public List<User> deserialize(JsonParser jsonParser, DeserializationContext cont
     private static class JacksonJsonSingletonHelper {
         private static final JacksonJson JACKSON_JSON = new JacksonJson();
         static {
-            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);
+            JACKSON_JSON.objectMapper.setPropertyNamingStrategy(PropertyNamingStrategies.LOWER_CAMEL_CASE);
             JACKSON_JSON.objectMapper.setSerializationInclusion(Include.ALWAYS);
         }
     }