i3c: add patchwork entry to MAINTAINERS

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20250605094757.8655-2-wsa+renesas@sang-engineering.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: Wolfram Sang

MAINTAINERS

@@ -11468,6 +11468,7 @@ M:	Alexandre Belloni <alexandre.belloni@bootlin.com>
 R:	Frank Li <Frank.Li@nxp.com>
 L:	linux-i3c@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
+Q:	https://patchwork.kernel.org/project/linux-i3c/list/
 C:	irc://chat.freenode.net/linux-i3c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux.git
 F:	Documentation/ABI/testing/sysfs-bus-i3c