fix(cilium): Correct L2 kustomization exclusion logic (#1314)

bootstrap/templates/kubernetes/apps/kube-system/cilium/app/kustomization.yaml.j2

@@ -6,7 +6,7 @@ resources:
   - ./cilium-bgp.yaml
   {% endif %}
   {% if ( (not distribution.talos.bgp.enabled) and
-          (feature_gates.dual_stack_ipv4_first) ) %}
+          (not feature_gates.dual_stack_ipv4_first) ) %}
   - ./cilium-l2.yaml
   {% endif %}
   - ./helmrelease.yaml