fix: use ingress subdomain instead of ipv4 to better reflect usage

Signed-off-by: Devin Buhl <devin@buhl.casa>

kubernetes/apps/default/echo-server/app/helmrelease.yaml

@@ -56,7 +56,7 @@ spec:
         enabled: true
         ingressClassName: nginx
         annotations:
-          external-dns.alpha.kubernetes.io/target: "ipv4.${SECRET_DOMAIN}"
+          external-dns.alpha.kubernetes.io/target: "ingress.${SECRET_DOMAIN}"
           hajimari.io/icon: video-input-antenna
         hosts:
           - host: &host "{{ .Release.Name }}.${SECRET_DOMAIN}"