mit.txt in licensee-9.15.3

- old
+ new

@@ -8,10 +8,10 @@
 
 how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file. Replace [year] with the current year and [fullname] with the name (or names) of the copyright holders.
 
 using:
   Babel: https://github.com/babel/babel/blob/master/LICENSE
-  .NET Core: https://github.com/dotnet/runtime/blob/master/LICENSE.TXT
+  .NET: https://github.com/dotnet/runtime/blob/main/LICENSE.TXT
   Rails: https://github.com/rails/rails/blob/master/MIT-LICENSE
 
 permissions:
   - commercial-use
   - modifications