Update license (#87)

Author: msub2

LICENSE.md/LICENSE.md renamed to LICENSE.md

@@ -1,6 +1,6 @@
 All Reports in this Repository are licensed by Contributors
 under the
-[W3C Software and Document License](http://www.w3.org/Consortium/Legal/2015/copyright-software-and-document).
+[W3C Software and Document License](https://www.w3.org/copyright/software-license-2023/).
 
 Contributions to Specifications are made under the
 [W3C CLA](https://www.w3.org/community/about/agreements/cla/).