fix(named.conf.local.jinja): fix salt-lint errors

```bash
Examining bind/files/named.conf.local.jinja of type state
[206] Jinja variables should have spaces before and after: {{ var_name }}
bind/files/named.conf.local.jinja:49
  allow-update { {{args['allow-update']}}; };
```

bind/files/named.conf.local.jinja

@@ -46,7 +46,7 @@ zone "{{ key }}" {
   inline-signing yes;
   {%- endif %}
   {%- if args['allow-update'] is defined %}
-  allow-update { {{args['allow-update']}}; };
+  allow-update { {{ args['allow-update'] }}; };
   {%- endif %}
   {%- if args.update_policy is defined %}
   update-policy {