doc: add gurgunday to collaborators

Author: gurgunday

README.md

@@ -158,6 +158,8 @@ For information about the governance of the Node.js project, see
   **Ruben Bridgewater** <<ruben@bridgewater.de>> (he/him)
 * [gireeshpunathil](https://github.com/gireeshpunathil) -
   **Gireesh Punathil** <<gpunathi@in.ibm.com>> (he/him)
+* [gurgunday](https://github.com/gurgunday) -
+  **Gürgün Dayıoğlu** <<hey@gurgun.day>> (he/him)
 * [jasnell](https://github.com/jasnell) -
   **James M Snell** <<jasnell@gmail.com>> (he/him)
 * [joyeecheung](https://github.com/joyeecheung) -