netfs: add Paulo as maintainer and remove myself as Reviewer

My role has changed since I originally agreed to help with netfs, and
I'm no longer providing a lot of value here. Luckily, Paulo has agreed
to step in as co-maintainer.

Acked-by: Paulo Alcantara <[email protected]>
Signed-off-by: Jeff Layton <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>

Author: jtlayton

MAINTAINERS

@@ -8949,7 +8949,7 @@ F:	include/linux/iomap.h
 
 FILESYSTEMS [NETFS LIBRARY]
 M:	David Howells <[email protected]>
-R:	Jeff Layton <[email protected]>
+M:	Paulo Alcantara <[email protected]>
 L:	[email protected]
 L:	[email protected]
 S:	Supported