DEVELOPERS: update email for Titouan Christophe

Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit b8e8cf6ea0f65161510debbe4de53a6efb5568b1)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

DEVELOPERS

@@ -3265,7 +3265,7 @@ F:	toolchain/
 N:	Timo Ketola <timo.ketola@exertus.fi>
 F:	package/fbgrab/
 
-N:	Titouan Christophe <titouanchristophe@gmail.com>
+N:	Titouan Christophe <titouan.christophe@mind.be>
 F:	package/avro-c/
 F:	package/mosquitto/
 F:	package/python-avro/