add ingress-nginx dependency to ingress-nginx network policies

kubernetes/infrastructure/cilium/cilium.yaml

@@ -25,3 +25,8 @@ spec:
     kind: GitRepository
     namespace: flux-system
     name: flux-system
+  dependsOn:
+    - name: cilium
+      namespace: kube-system
+    - name: ingress-nginx
+      namespace: kube-system