Squashfs: update email address

My existing email address may stop working in a month or two, so update
email to one that will continue working.

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
diff --git a/MAINTAINERS b/MAINTAINERS
index 531c5cf..b28f6a7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5906,7 +5906,7 @@
 F:	arch/powerpc/platforms/cell/spufs/
 
 SQUASHFS FILE SYSTEM
-M:	Phillip Lougher <phillip@lougher.demon.co.uk>
+M:	Phillip Lougher <phillip@squashfs.org.uk>
 L:	squashfs-devel@lists.sourceforge.net (subscribers-only)
 W:	http://squashfs.org.uk
 S:	Maintained