meta: add mailmap entry for Morgan Roderick

PR-URL: #43144
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

.mailmap

@@ -357,6 +357,8 @@ Mitar Milutinovic <mitar.git@tnode.com>
 Mithun Sasidharan <mithunsasidharan89@gmail.com> <msasidharan@paypal.com>
 Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
 Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com> <62040526+VoltrexMaster@users.noreply.github.com>
+Morgan Roderick <morgan@roderick.dk>
+Morgan Roderick <morgan@roderick.dk> <20321+mroderick@users.noreply.github.com>
 MURAKAMI Masahiko <m-murakami@esm.co.jp> <fossamagna2@gmail.com>
 Myles Borins <myles.borins@gmail.com> <mborins@us.ibm.com>
 Myles Borins <myles.borins@gmail.com> <mylesborins@github.com>