Use standard Jenkins MIT license header

Author: somiljain2006

core/src/main/resources/hudson/PluginWrapper/index.jelly

@@ -1,7 +1,7 @@
 <!--
 The MIT License
 
-Copyright (c) 2025, CloudBees, Inc.
+Copyright (c) 2004-, Kohsuke Kawaguchi, Sun Microsystems, Inc., and a number of other of contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal