[Release-1.28] Bump ingress-nginx to 1.9.6

[dereknola]

Proposed Changes

Backport #5671

Types of Changes

Verification

kubectl get pods -A -o json | jq '.items[] | select(.metadata.labels."app.kubernetes.io/name") | { name: .metadata.labels."app.kubernetes.io/name", version: .metadata.labels."app.kubernetes.io/version" }'
...
{
  "name": "rke2-ingress-nginx",
  "version": "1.9.6"
}

Testing

Linked Issues

#5685

User-Facing Change

Further Comments