MAINTAINERS: use new drbd-dev mailing list

We are migrating from our own infrastructure to lists.linux.dev, so
change the drbd-dev address to point to the new domain.

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Link: https://patch.msgid.link/20260513065557.36042-1-christoph.boehmwalder@linbit.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: chrboe

MAINTAINERS

@@ -7774,7 +7774,7 @@ DRBD DRIVER
 M:	Philipp Reisner <philipp.reisner@linbit.com>
 M:	Lars Ellenberg <lars.ellenberg@linbit.com>
 M:	Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
-L:	drbd-dev@lists.linbit.com
+L:	drbd-dev@lists.linux.dev
 S:	Supported
 W:	http://www.drbd.org
 T:	git git://git.linbit.com/linux-drbd.git