(proxy) fix template squid auth

src/opnsense/service/templates/OPNsense/Proxy/squid.conf

@@ -167,7 +167,7 @@ acl Safe_ports port {{element.split(":")[0]}} # {{element.split(":")[1]|default(
 acl CONNECT method CONNECT
 
 # Authentication Settings
-{% if helpers.exists('OPNsense.proxy.forward.authentication.method') and  OPNsense.proxy.forward.authentication.method=='local' %}
+{% if helpers.exists('OPNsense.proxy.forward.authentication.method') and  OPNsense.proxy.forward.authentication.method != '' %}
 # Configure Local User Authentication helper
 auth_param basic program /usr/local/etc/inc/squid.auth-user.php
 {% if helpers.exists('OPNsense.proxy.forward.authentication.realm') %}