Updating mailmap to map to correct user

.mailmap

@@ -6,6 +6,8 @@ Colin Clark <colin.clark@cclark.uk>
 <mschwendt@fedoraproject.org> <mschwendt@gmail.com>
 <michal@cihar.com> <mcihar@suse.cz>
 <michal@cihar.com> <nijel@debian.org>
-<jrs+git@weitnahbei.de> J. R. Schmid <sixtyfive@users.noreply.github.com>
+<jrs+git@weitnahbei.de> <sixtyfive@users.noreply.github.com>
 Morgan Hardwood <entertheyoni@gmail.com>
 Rezső Páder <rezso@rezso.net>
+Olaf Seibert <rhialto@falu.nl> <>
+<niko@nava.de> <nikoss@users.noreply.github.com>