fix(aula-12): permitir node-exporter com PodSecurity privileged

O namespace monitoring precisa de enforce=privileged para o
prometheus-node-exporter que usa hostNetwork, hostPID e hostPath.

aula-12/setup.sh

@@ -180,6 +180,7 @@ helm repo add vm https://victoriametrics.github.io/helm-charts/ 2>/dev/null || t
 helm repo update vm
 
 kubectl create namespace monitoring 2>/dev/null || true
+kubectl label namespace monitoring pod-security.kubernetes.io/enforce=privileged --overwrite
 
 if helm status monitoring -n monitoring &> /dev/null; then
     log_warn "Já instalado. Atualizando..."