Fix branch name regex not saving in /admin/push_rule page

Missing permitted param caused this field never to be saved.

Closes #3383

app/controllers/admin/push_rules_controller.rb

@@ -25,7 +25,7 @@ class Admin::PushRulesController < Admin::ApplicationController
 
   def push_rule_params
     params.require(:push_rule).permit(:deny_delete_tag, :delete_branch_regex,
-      :commit_message_regex, :force_push_regex, :author_email_regex, :member_check,
+      :commit_message_regex, :branch_name_regex, :force_push_regex, :author_email_regex, :member_check,
       :file_name_regex, :max_file_size, :prevent_secrets)
   end
 

changelogs/unreleased-ee/sh-fix-admin-push-regex.yml

+---
+title: Fix branch name regex not saving in /admin/push_rule config
+merge_request:
+author:
+type: fixed

spec/controllers/admin/push_rules_controller_spec.rb

@@ -10,7 +10,7 @@ describe Admin::PushRulesController do
   describe '#update' do
     let(:params) do
       {
-        deny_delete_tag: true, delete_branch_regex: "any", commit_message_regex: "any",
+        deny_delete_tag: true, delete_branch_regex: "any", commit_message_regex: "any", branch_name_regex: "any",
         force_push_regex: "any", author_email_regex: "any", member_check: true, file_name_regex: "any",
         max_file_size: "0", prevent_secrets: true
       }