fix: remove md extension from LICENSE file

Signed-off-by: Brian McGee <[email protected]>

Author: brianmcgee

README.md

@@ -175,7 +175,7 @@ Source projects: <https://numtide.com/contact>
 ## License
 
 Unless explicitly stated otherwise, any contribution intentionally submitted for inclusion will be licensed under the
-[MIT license](LICENSE.md) without any additional terms or conditions.
+[MIT license](LICENSE) without any additional terms or conditions.
 
 [Brian]: https://github.com/brianmcgee
 [zimbatm]: https://github.com/zimbatm