workqueue: add myself as a dedicated reviwer

I am one of the dedicated reviwers of workqueue.c. Now I add myself
to the MAINTAINERS entry with the updated email address.

The old [email protected] will be ended soon.

Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8133cef..f136c29 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11165,6 +11165,7 @@
 
 WORKQUEUE
 M:	Tejun Heo <[email protected]>
+R:	Lai Jiangshan <[email protected]>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git
 S:	Maintained
 F:	include/linux/workqueue.h