project.config: disable voting for Blocked Users

Change-Id: I5209b8ca2c99425cb730f6c8c5101eb88df43aba

project.config

diff --git a/project.config b/project.config
index b1a4404..1577035 100644
--- a/project.config
+++ b/project.config
@@ -29,6 +29,7 @@
 	label-Code-Review = -2..+2 group Administrators
 	label-Code-Review = -2..+2 group Project Owners
 	label-Code-Review = -1..+1 group Registered Users
+	label-Code-Review = block -1..+1 group Blocked Users
 	submit = group Administrators
 	submit = group Project Owners
 	editTopicName = +force group Administrators