fix(dualstack): don't impose defaults in values.yaml but use kubernetes defaults instead

Author: danielr1996

charts/minecraft/values.yaml

@@ -303,8 +303,8 @@ minecraftServer:
   ## Set the externalTrafficPolicy in the Service to either Cluster or Local
   # externalTrafficPolicy: Cluster
   externalIPs:
-  ipFamilies: [IPv4, IPv6]
-  ipFamilyPolicy: PreferDualStack
+  ipFamilies:
+  ipFamilyPolicy:
 
   # List with URLs and paths to jar files, additionally may be a directory with jars
   # This works for both mods and plugins depending on server type