Add appropriate thanks

Author: brettcannon

news/1 Enhancements/961.md

@@ -1,2 +1,3 @@
 Enable syntax highlighting for `requirements.in` files as used by
-e.g. [pip-tools](https://github.com/jazzband/pip-tools).
+e.g. [pip-tools](https://github.com/jazzband/pip-tools)
+(thanks [Lorenzo Villani](https://github.com/lvillani))