mailmap: modify the entry for Mathieu Othacehe

Set my gnu address as the main one.

Link: https://lkml.kernel.org/r/20241217100924.7821-1-othacehe@gnu.org
Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
Cc: Alex Elder <elder@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geliang Tang <geliang@kernel.org>
Cc: Kees Cook <kees@kernel.org>
Cc: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Cc: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>
Cc: Quentin Monnet <qmo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: Mathieu Othacehe

.mailmap

@@ -435,7 +435,7 @@ Martin Kepplinger <martink@posteo.de> <martin.kepplinger@ginzinger.com>
 Martin Kepplinger <martink@posteo.de> <martin.kepplinger@puri.sm>
 Martin Kepplinger <martink@posteo.de> <martin.kepplinger@theobroma-systems.com>
 Martyna Szapar-Mudlaw <martyna.szapar-mudlaw@linux.intel.com> <martyna.szapar-mudlaw@intel.com>
-Mathieu Othacehe <m.othacehe@gmail.com> <othacehe@gnu.org>
+Mathieu Othacehe <othacehe@gnu.org> <m.othacehe@gmail.com>
 Mat Martineau <martineau@kernel.org> <mathew.j.martineau@linux.intel.com>
 Mat Martineau <martineau@kernel.org> <mathewm@codeaurora.org>
 Matthew Wilcox <willy@infradead.org> <matthew.r.wilcox@intel.com>