fix(deps): update dependency com.openai:openai-java to v4

Author: renovate[bot]

gradle/libs.versions.toml

@@ -22,7 +22,7 @@ langchain4j = "1.7.1"
 mockk = "1.14.6"
 netty = "4.2.6.Final"
 nexusPublish = "2.0.0"
-openai = "3.7.1"
+openai = "4.0.1"
 openrewrite = "7.17.0"
 slf4j = "2.0.17"
 spotless = "8.0.0"