MAINTAINERS: change e-mail of Artem Bityutskiy

Nowadays I have all my comunity-related stuff at gmail, so update
my e-mail address.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

MAINTAINERS

@@ -5241,7 +5241,7 @@ S:	Maintained
 F:	drivers/scsi/u14-34f.c
 
 UBI FILE SYSTEM (UBIFS)
-M:	Artem Bityutskiy <dedekind@infradead.org>
+M:	Artem Bityutskiy <dedekind1@gmail.com>
 M:	Adrian Hunter <adrian.hunter@nokia.com>
 L:	linux-mtd@lists.infradead.org
 T:	git git://git.infradead.org/ubifs-2.6.git
@@ -5292,7 +5292,7 @@ F:	drivers/cdrom/cdrom.c
 F:	include/linux/cdrom.h
 
 UNSORTED BLOCK IMAGES (UBI)
-M:	Artem Bityutskiy <dedekind@infradead.org>
+M:	Artem Bityutskiy <dedekind1@gmail.com>
 W:	http://www.linux-mtd.infradead.org/
 L:	linux-mtd@lists.infradead.org
 T:	git git://git.infradead.org/ubi-2.6.git