Fix a linter warning about documentation comment in generated by Prism Java source file

PullRequest: truffleruby/4311

Author: andrykonchin

src/yarp/java/org/prism/Loader.java

@@ -1,10 +1,10 @@
-/******************************************************************************/
+/* ****************************************************************************/
 /* This file is generated by the templates/template.rb script and should not  */
 /* be modified manually. See                                                  */
 /* templates/java/org/prism/Loader.java.erb                                   */
 /* if you are looking to modify the                                           */
 /* template                                                                   */
-/******************************************************************************/
+/* ****************************************************************************/
 
 package org.prism;