MAINTAINERS: update I2C web resources

Advertise the patchwork tracker. Also, change to https for the website.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

MAINTAINERS

@@ -4209,7 +4209,8 @@ F:	drivers/i2c/i2c-stub.c
 I2C SUBSYSTEM
 M:	Wolfram Sang <wsa@the-dreams.de>
 L:	linux-i2c@vger.kernel.org
-W:	http://i2c.wiki.kernel.org/
+W:	https://i2c.wiki.kernel.org/
+Q:	https://patchwork.ozlabs.org/project/linux-i2c/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
 S:	Maintained
 F:	Documentation/i2c/