chore: update AUTHORS.rst file with new author(s)

Author: actions-user

AUTHORS.rst

@@ -35,6 +35,7 @@ Additional contributions by (sorted by name)
 - Paul Angerer <48882462+dabauxi@users.noreply.github.com>
 - Paul Angerer <48882462+etimoz@users.noreply.github.com>
 - Peter Boothe <pboothe@pboothe2.nyc.corp.google.com>
+- Sebastian Weigand <s.weigand.phy@gmail.com>
 - Sho Iwamoto <sho.iwamoto@pd.infn.it>
 - Swen Kooij <swenkooij@gmail.com>
 - happlebao <c.x.bao@student.ucc.ie>