project.config: set Blocked Users access to BLOCK

This should be a noop, but is more correct in that projects inheriting
the policy can't override it.

Change-Id: I03d75e624821b73c1110940a42f8c67d029ed9e3

project.config

diff --git a/project.config b/project.config
index 97429e2..b1a4404 100644
--- a/project.config
+++ b/project.config
@@ -8,16 +8,16 @@
 [submit]
 	mergeContent = true
 [access "refs/*"]
-	read = deny group Blocked Users
 	read = group Administrators
 	read = group Anonymous Users
+	read = block group Blocked Users
 	revert = deny group Anonymous Users
 	revert = deny group Registered Users
 	revert = group aom-committers
 	revert = group aom-interns
 [access "refs/for/refs/*"]
-	push = deny group Blocked Users
 	push = group Registered Users
+	push = block group Blocked Users
 [access "refs/heads/*"]
 	create = group Administrators
 	create = group Project Owners