MAINTAINERS: update Seth email

Update/unify my contact info.  The old email address will no longer work
soon.
Signed-off-by: Seth Jennings <sjenning@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -12133,7 +12133,7 @@ F:	drivers/net/hamradio/*scc.c
 F:	drivers/net/hamradio/z8530.h
 
 ZBUD COMPRESSED PAGE ALLOCATOR
-M:	Seth Jennings <sjennings@variantweb.net>
+M:	Seth Jennings <sjenning@redhat.com>
 L:	linux-mm@kvack.org
 S:	Maintained
 F:	mm/zbud.c
@@ -12188,7 +12188,7 @@ F:	include/linux/zsmalloc.h
 F:	Documentation/vm/zsmalloc.txt
 
 ZSWAP COMPRESSED SWAP CACHING
-M:	Seth Jennings <sjennings@variantweb.net>
+M:	Seth Jennings <sjenning@redhat.com>
 L:	linux-mm@kvack.org
 S:	Maintained
 F:	mm/zswap.c