When an entity class contains fields of Class<?> type, an infinite loop. Fixes #2591

Author: bnasslahsen

Diff for: springdoc-openapi-starter-common/src/main/java/org/springdoc/core/extractor/MethodParameterPojoExtractor.java

@@ -88,6 +88,7 @@ public class MethodParameterPojoExtractor {
 		SIMPLE_TYPES.add(Iterable.class);
 		SIMPLE_TYPES.add(Duration.class);
 		SIMPLE_TYPES.add(LocalTime.class);
+		SIMPLE_TYPES.add(Class.class);
 
 		SIMPLE_TYPE_PREDICATES.add(Class::isPrimitive);
 		SIMPLE_TYPE_PREDICATES.add(Class::isEnum);