MAINTAINERS: add Ryan-CW as owner of serial_v2

Author: Ryan-CW-Code

MAINTAINERS

@@ -68,3 +68,8 @@ owners: Bingru Zhang(Rbb666)<[email protected]>, Yuqiang Wang(kurisaW)<2053731441
 tag: workflow
 path: .github
 owners: supper thomas(supperthomas)<[email protected]>, Bingru Zhang(Rbb666)<[email protected]>, Yuqiang Wang(kurisaW)<[email protected]>
+
+tag: serial_v2
+path: components/drivers/serial/dev_serial_v2.c
+path: components/drivers/include/drivers/dev_serial_v2.h
+owners: Chen Bei Dou(Ryan-CW-Code)<[email protected]>