Add externalTrafficPolicy configuration for pihole in helmfile.yaml

Introduce externalTrafficPolicy set to Cluster in the pihole service configuration. This change enhances traffic routing and improves the handling of external requests to the pihole application.

Author: max06

apps/pihole/helmfile.yaml

@@ -15,6 +15,7 @@ releases:
           mixedService: true
           annotations:
             "lbipam.cilium.io/ips": "192.168.30.241"
+          externalTrafficPolicy: Cluster
         doh:
           enabled: true
         extraEnvVars: