MAINTAINERS: reorder preferred email for Steve French

The maintainer script displays the first email if two provided,
so reorder my email to put the preferred first.

Signed-off-by: Steve French <stfrench@microsoft.com>

Author: smfrench

MAINTAINERS

@@ -12656,8 +12656,8 @@ F:	tools/testing/selftests/
 KERNEL SMB3 SERVER (KSMBD)
 M:	Namjae Jeon <linkinjeon@kernel.org>
 M:	Namjae Jeon <linkinjeon@samba.org>
-M:	Steve French <sfrench@samba.org>
 M:	Steve French <smfrench@gmail.com>
+M:	Steve French <sfrench@samba.org>
 R:	Sergey Senozhatsky <senozhatsky@chromium.org>
 R:	Tom Talpey <tom@talpey.com>
 L:	linux-cifs@vger.kernel.org