doc: add Philipp Dunkel to contributors

Signed-off-by: Philipp Dunkel <pip@pipobscure.com>

Author: pipobscure

README.md

@@ -415,6 +415,8 @@ For information about the governance of the Node.js project, see
   **Filip Skokan** <<panva.ip@gmail.com>> (he/him) - [Support me](https://github.com/sponsors/panva)
 * [pimterry](https://github.com/pimterry) -
   **Tim Perry** <<pimterry@gmail.com>> (he/him)
+* [pipobscure](https://github.com/pipobscure) -
+  **Philipp Dunkel** <<pip@pipobscure.com>> (he/him)
 * [pmarchini](https://github.com/pmarchini) -
   **Pietro Marchini** <<pietro.marchini94@gmail.com>> (he/him)
 * [Qard](https://github.com/Qard) -