block, bfq: update Paolo's address in maintainer list

Current email address of Paolo Valente is no longer valid, use a good one.

Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Link: https://lore.kernel.org/r/20230523091724.26636-1-paolo.valente@unimore.it
Signed-off-by: Jens Axboe <axboe@kernel.dk>

MAINTAINERS

@@ -3548,7 +3548,7 @@ F:	Documentation/filesystems/befs.rst
 F:	fs/befs/
 
 BFQ I/O SCHEDULER
-M:	Paolo Valente <paolo.valente@linaro.org>
+M:	Paolo Valente <paolo.valente@unimore.it>
 M:	Jens Axboe <axboe@kernel.dk>
 L:	linux-block@vger.kernel.org
 S:	Maintained