Bump registry to v2.7.7-gitlab from v2.7.6-gitlab

changelogs/unreleased/bump-registry-version-v2-7-7-gitlab.yml

+---
+title: Bump registry to v2.7.7-gitlab from v2.7.6-gitlab
+merge_request: 3879
+author:
+type: changed

config/software/registry.rb

@@ -19,7 +19,7 @@
 require "#{Omnibus::Config.project_root}/lib/gitlab/version"
 name 'registry'
-version = Gitlab::Version.new('registry', 'v2.7.6-gitlab')
+version = Gitlab::Version.new('registry', 'v2.7.7-gitlab')
 default_version version.print(false)