fix can not edit proxy template

bin/v-change-web-domain-proxy-tpl

@@ -42,7 +42,7 @@ is_object_valid 'user' 'USER' "$user"
 is_object_unsuspended 'user' 'USER' "$user"
 is_object_valid 'web' 'DOMAIN' "$domain"
 is_object_unsuspended 'web' 'DOMAIN' "$domain"
-is_object_value_exist 'web' 'DOMAIN' "$domain" '$PROXY'
+is_object_value_exist 'web' 'DOMAIN' "$domain" 'PROXY'
 is_proxy_template_valid $template