Update LICENSE to show the license type explicitly

Author: arithy

LICENSE

@@ -1,5 +1,7 @@
 SoftFloatPy: A Python binding of Berkeley SoftFloat.
 
+MIT License
+
 Copyright (c) 2024-2026 Arihiro Yoshida. All rights reserved.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -9,8 +11,8 @@ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,