Restrict the ability to upload patch sets to other people's changes.

Bug: b/375065394
Change-Id: I1dc0eef1f2abe958757001548f4ae6e08b6251df
Reviewed-on: https://boringssl-review.googlesource.com/c/All-Projects/+/72347
Auto-Submit: Bob Beck <bbe@google.com>
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: Bob Beck <bbe@google.com>

project.config

diff --git a/project.config b/project.config
index acdaa21..1239226 100644
--- a/project.config
+++ b/project.config
@@ -109,7 +109,7 @@
 	push = group bot-commit-grandfathered-bots
 	push = group mdb/boringssl-commiters
 [access "refs/for/*"]
-	addPatchSet = group Registered Users
+	addPatchSet = group mdb/boringssl-committers
 [access "refs/heads/chromium-stable-with-bazel"]
 	push = group Bazel robots
 	push = group bot-commit-grandfathered-bots