feat(helm): update chart ingress-nginx to 4.8.4

| datasource | package       | from  | to    |
| ---------- | ------------- | ----- | ----- |
| helm       | ingress-nginx | 4.2.3 | 4.8.4 |

Author: chii-bot[bot]

cluster/apps/networking/ingress-nginx/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: ingress-nginx
-      version: 4.2.3
+      version: 4.8.4
       sourceRef:
         kind: HelmRepository
         name: ingress-nginx-charts