Update LICENSE.md

License file changed to be that of the csdb collection.

It is still MIT, but copyright information is different for files
belonging to the collection and other files.

Author: delphidabbler

LICENSE.md

@@ -1,6 +1,10 @@
 # MIT License
 
-**Copyright (c) 2020-2023 Peter Johnson (https://en.gravatar.com/delphidabbler)**
+All `.dat` files in the `collection` directory and certain `.pas` files in the `tests` directory that were generated from the collection are copyright © 2005-2021, [Peter Johnson](https://gravatar.com/delphidabbler) and [Contributors](https://github.com/delphidabbler/code-snippets/tree/master/collection/CONTRIBUTORS).
+
+All other files in this project are  copyright © 2020-2023, [Peter Johnson](https://gravatar.com/delphidabbler).
+
+----
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights 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: