updating the visibility modifier in spring.hibernate.AbstractHibernateDao (#11294)

Co-authored-by: Shashank <shashankgowri@gmail.com>

persistence-modules/spring-jpa-2/src/main/java/com/baeldung/spring/hibernate/AbstractHibernateDao.java

@@ -15,7 +15,7 @@ public abstract class AbstractHibernateDao<T extends Serializable> {
     @Autowired
     protected SessionFactory sessionFactory;
 
-    protected final void setClazz(final Class<T> clazzToSet) {
+    public final void setClazz(final Class<T> clazzToSet) {
         clazz = Preconditions.checkNotNull(clazzToSet);
     }