Customize Renovate service

By adding a renovate.json to the default branch we can configure and
customize Renovate's functionality.

Author: yuumasato

renovate.json

@@ -0,0 +1,13 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
+  "extends": [
+    "config:recommended"
+  ],
+  "labels": [
+    "ok-to-test"
+  ],
+  "enabledManagers": [
+      "tekton",
+      "rpm-lockfile"
+  ]
+}