Disable renovate dashboard

Renovate dashboard is a feature that creates an issue that updates with the pending updates that this repository has: https://docs.renovatebot.com/key-concepts/dashboard/

We follow these PRs renovate (and dependabot) creates using Zenhub.

Solves #484

.github/renovate.json5

@@ -1,6 +1,9 @@
 {
   "extends": [
-    "config:base"
+    "config:base",
+    // Disable the creation of this issue that renovate updates with the pending issue we follow with Zenhub:
+    // https://github.com/newrelic/helm-charts/issues/484
+    ":disableDependencyDashboard"
   ],
   "bumpVersion": "patch",
   "enabledManagers": [