Allow optional definition of ingress (#222)

Author: drewburr

charts/minecraft/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: minecraft
-version: 4.20.0
+version: 4.21.0
 appVersion: SeeValues
 home: https://minecraft.net/
 description: Minecraft server

charts/minecraft/templates/extraports-ing.yaml

@@ -1,6 +1,6 @@
 {{- $minecraftFullname := include "minecraft.fullname" . }}
 {{- range .Values.minecraftServer.extraPorts }}
-{{- if default "" .ingress.enabled }}
+{{- if default "" (.ingress).enabled }}
 {{- $servicePort := .service.port }}
 {{- $serviceName := printf "%s-%s" $minecraftFullname .name }}
 ---