MAINTAINERS: update the Inside Secure maintainer email

Free Electrons became Bootlin. Update my email accordingly.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

MAINTAINERS

@@ -6989,7 +6989,7 @@ F:	drivers/input/input-mt.c
 K:	\b(ABS|SYN)_MT_
 
 INSIDE SECURE CRYPTO DRIVER
-M:	Antoine Tenart <antoine.tenart@free-electrons.com>
+M:	Antoine Tenart <antoine.tenart@bootlin.com>
 F:	drivers/crypto/inside-secure/
 S:	Maintained
 L:	linux-crypto@vger.kernel.org