[java-spring] provide a clarifying comment for the generated EnumConverterConfiguration class

Author: cgual-omnidian

modules/openapi-generator/src/main/resources/JavaSpring/converter.mustache

@@ -12,6 +12,13 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.convert.converter.Converter;
 
+/**
+ * This class provides Spring Converter beans for the enum models in the OpenAPI specification.
+ *
+ * By default, Spring only converts primitive types to enums using Enum::valueOf, which can prevent
+ * correct conversion if the OpenAPI specification is using an `enumPropertyNaming` other than
+ * `original` or the specification has an integer enum.
+ */
 @Configuration(value = "{{configPackage}}.enumConverterConfiguration")
 public class EnumConverterConfiguration {