Update renovate.json to use shared config

renovate.json

@@ -1,30 +1,6 @@
 {
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "platform": "github",
-  "labels": ["renovate"],
-  "extends": [
-    "config:base",
-    ":rebaseStalePrs"
-  ],
-  "enabledManagers": [
-    "github-actions",
-    "helm-values",
-    "helmv3"
-  ],
-  "stabilityDays": 3,
-  "prHourlyLimit": 0,
-  "prConcurrentLimit": 0,
-  "branchConcurrentLimit": 0,
-  "dependencyDashboard": false,
-  "gitAuthor": "Renovate Bot <[email protected]>",
-  "packageRules": [
-    {
-      "matchManagers": ["helm-values", "helmv3"],
-      "groupName": "Helm dependencies"
-    },
-    {
-      "matchManagers": ["github-actions"],
-      "groupName": "Pipeline dependencies"
-    }
-  ]
-}
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": [
+      "github>gsoft-inc/renovate-config"
+    ]
+  }