Add temporary new bors e-mail address to the mailmap

To match it to bors in thanks.

Author: Kobzol

.mailmap

@@ -96,6 +96,7 @@ boolean_coercion <booleancoercion@gmail.com>
 Boris Egorov <jightuse@gmail.com> <egorov@linux.com>
 bors <bors@rust-lang.org> bors[bot] <26634292+bors[bot]@users.noreply.github.com>
 bors <bors@rust-lang.org> bors[bot] <bors[bot]@users.noreply.github.com>
+bors <bors@rust-lang.org> <122020455+rust-bors[bot]@users.noreply.github.com>
 BoxyUwU <rust@boxyuwu.dev>
 BoxyUwU <rust@boxyuwu.dev> <supbscripter@gmail.com>
 Braden Nelson <moonheart08@users.noreply.github.com>