Update README.md

Author: ramalho

18-context-mngr/lispy/README.md

@@ -23,4 +23,6 @@ and separate tests for each expression and special form handled by `evaluate`.
 The copyright holder is Peter Norvig and the code is licensed under the
 [MIT license](https://github.com/norvig/pytudes/blob/60168bce8cdfacf57c92a5b2979f0b2e95367753/LICENSE).
 
-I, Luciano Ramalho, wrote the changes and additions described above.
+I wrote the changes and additions described above.
+
+— Luciano Ramalho (@ramalho), 2021-06-09.