Update and rename LICENSE to LICENSE.md

Author: runspired

LICENSE LICENSE.md

@@ -1,8 +1,8 @@
 MIT License
 
 Copyright (c) 2017-2024 Ember.js and contributors
-Portions Copyright (c) 2011-2017 Tilde, Inc. and contributors.
-Portions Copyright (c) 2011 LivingSocial Inc.
+Copyright (c) 2011-2017 Tilde, Inc. and contributors
+Copyright (c) 2011 LivingSocial Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal