project.config: add revert permissions to boringssl refs/*

Bug: b/396344378
Change-Id: Icfa362467a895c09feb4ad39099f364ade81ce27
Reviewed-on: https://boringssl-review.googlesource.com/c/All-Projects/+/76827
Reviewed-by: Josip Sokcevic <sokcevic@google.com>

project.config

diff --git a/project.config b/project.config
index ba20edc..f1c9004 100644
--- a/project.config
+++ b/project.config
@@ -13,6 +13,9 @@
 	read = group Registered Users
 	read = group luci-config-service-account
 	read = group mdb/boringssl-committers
+	revert = group Change Owner
+	revert = group Project Owners
+	revert = group mdb/boringssl-committers
 [access "refs/for/refs/*"]
 	push = group Registered Users
 	pushMerge = group Registered Users