MAINTAINERS: update the Annapurna Labs maintainer email

Free Electrons became Bootlin. Update my email accordingly.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

MAINTAINERS

@@ -1251,7 +1251,7 @@ N:	meson
 
 ARM/Annapurna Labs ALPINE ARCHITECTURE
 M:	Tsahee Zidenberg <tsahee@annapurnalabs.com>
-M:	Antoine Tenart <antoine.tenart@free-electrons.com>
+M:	Antoine Tenart <antoine.tenart@bootlin.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-alpine/