project.config: grant LUCI trybot vote on internal branches too

Mostly to test that CL 522179 works, but it'll also be useful in the
rare case someone needs to make a cherry-pick for a vendored package.

Change-Id: I40c0154439011afcdd0a50401e75c2fca46cbe2f
Reviewed-on: https://go-review.googlesource.com/c/All-Projects/+/522535
Reviewed-by: Heschi Kreinick <heschi@google.com>

project.config

diff --git a/project.config b/project.config
index 574bfe0..b0b484d 100644
--- a/project.config
+++ b/project.config
@@ -76,7 +76,7 @@
 	submit = group mdb/golang-release-eng-policy
 	label-Auto-Submit = +0..+1 group gobot
 	label-Auto-Submit = +0..+1 group mdb/golang-release-eng-policy
-[access "^refs/heads/(master|release-branch.go1.20|release-branch.go1.21)"]
+[access "^refs/heads/(master|(release|internal)-branch\.go1\.(20|21).*)"]
 	submit = group luci_scoped_account
 	label-Commit-Queue = +0..+2 group mdb/golang-release-eng-policy
 	label-Commit-Queue = +0..+1 group cria/project-golang-may-start-trybots