Fix gluetun endpoint env var: use WIREGUARD_ENDPOINT_IP, drop port

gluetun rejects VPN_ENDPOINT_PORT when SERVER_NAMES is used (server
selection mode), and warns that VPN_ENDPOINT_IP is deprecated in
favour of WIREGUARD_ENDPOINT_IP. Use only WIREGUARD_ENDPOINT_IP;
port 51820 is ProtonVPN's default and doesn't need to be set.

servers/legion/k8s/media/fornax-workers.yaml

@@ -106,10 +106,8 @@ spec:
               value: "on"
             - name: FIREWALL_OUTBOUND_SUBNETS
               value: "10.42.0.0/16,10.43.0.0/16"
-            - name: VPN_ENDPOINT_IP
+            - name: WIREGUARD_ENDPOINT_IP
               value: "95.173.217.29"
-            - name: VPN_ENDPOINT_PORT
-              value: "51820"
           volumeMounts:
             - name: gluetun-data
               mountPath: /tmp/gluetun
@@ -316,10 +314,8 @@ spec:
               value: "on"
             - name: FIREWALL_OUTBOUND_SUBNETS
               value: "10.42.0.0/16,10.43.0.0/16"
-            - name: VPN_ENDPOINT_IP
+            - name: WIREGUARD_ENDPOINT_IP
               value: "146.70.58.130"
-            - name: VPN_ENDPOINT_PORT
-              value: "51820"
           volumeMounts:
             - name: gluetun-data
               mountPath: /tmp/gluetun