add Frank Charras to sklearn contributor list

Co-authored-by: Julien Jerphanion <[email protected]>

Author: reshamas

_posts/2023-07-31-paris-dev-sprint.md

@@ -30,6 +30,8 @@ The following [scikit-learn team members](https://scikit-learn.org/stable/about.
 1. Olivier Grisel (@ogrisel)
 1. Guillaume Lemaitre (@glemaitre)
 1. Tim Head (@betatim)
+1. Jérémie du Boisberranger (@jeremiedbb)
+1. Frank Charras (@fcharras)
 1. Maren Westermann
 1. Arturo Amor Quiroz
 1. Adrin Jalali