Add Becca as a WebUI reviewer

Becca has been contributing to the Web UI and expressed interest
in being a reviewer.

Change-Id: I5f5c9838a3acbbbd0dd39917dac72bc72c73acce
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 74c7175..d85cb3b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -44,3 +44,4 @@
 
 M:  Gunnar Mills <gmills@us.ibm.com> <gmills!>
 M:  Ed Tanous <ed.tanous@intel.com> <edtanous!>
+R:  Becca Shaw <rebecca.shaw@ibm.com>