logRequests: prettify json (body)

Author: deep-learning-dynamo

src/main/java/dev/ai4j/openai4j/Json.java

@@ -13,6 +13,7 @@ class Json {
  .setFieldNamingPolicy(LOWER_CASE_WITH_UNDERSCORES)
  .registerTypeAdapterFactory(MESSAGE_TYPE_ADAPTER_FACTORY)
  .registerTypeAdapter(Role.class, new RoleAdapter())
+ .setPrettyPrinting()
  .create();
 
  static String toJson(Object o) {