ci: add renovate configuration

CODEOWNERS

+# CODEOWNERS is used to lookup assignees for
+# Renovate Bot dependency change Merge Requests.
+# https://docs.renovatebot.com/configuration-options/#assigneesfromcodeowners
+* @andrewn

README.md

@@ -65,9 +65,7 @@ variables:
 include:
   - local: .gitlab-ci-asdf-versions.yml
-  # This template should be included in all Infrastructure projects.
-  # It includes standard checks, gitlab-scanners, validations and release processes
-  # common to all projects using this template library.
+  # Runs golang standard tests, including tests, goreleaser, golangci-lint and go-mod-tidy
   # see https://gitlab.com/gitlab-com/gl-infra/common-ci-tasks/-/blob/main/README.md#templatesgolangyml
   - project: 'gitlab-com/gl-infra/common-ci-tasks'
     ref: v1.16.0 # renovate:managed

renovate.json

+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "reviewersFromCodeOwners": true
+}