Update Helm release ingress-nginx to v4.8.0

Author: renovate[bot]

ingress-nginx/garden.yml

@@ -3,7 +3,7 @@ type: helm
 name: ingress-nginx
 repo: https://kubernetes.github.io/ingress-nginx
 chart: ingress-nginx
-version: 4.6.1
+version: 4.8.0
 namespace: ingress-nginx
 dependencies:
   - netbox-app-infra