feat(renovate): update package rules in .renovaterc.json

- Add new rule for `k3s-io/k3s`, `argo-cd` and `argocd-apps` packages
   - add note in PR body for manual intervention required for these updates

🤖

.renovaterc.json

@@ -41,6 +41,11 @@
     }
   ],
   "packageRules": [
+    {
+      "description": "Merged updates not applied by gitops",
+      "matchPackageNames": ["k3s-io/k3s", "argo-cd", "argocd-apps"],
+      "prBodyNotes": [":warning: **Manual Intervention**: This update needs manual deployment. Please review and take appropriate action."]
+    },
     {
       "description": "Separate minor and patch updates - Prometheus",
       "matchPackageNames": ["kube-prometheus-stack"],