Fix invalid ingress format for argo workflow

Author: adhasahar97

infrastructure/terraform/modules/helm/values/values-argo-workflows.yaml

@@ -2,4 +2,5 @@ server:
   ingress:
     enabled: true
     ingressClassName: "cloudflare-tunnel"
-    hostname: k8s-homelab-argo-workflows.${hostname}
+    hosts:
+      - k8s-homelab-argo-workflows.${hostname}