Update yamllint to fix dependency issue

I think this still validates everything we need it to

ansible/roles/privatebin/files/docker-compose.yml

@@ -4,7 +4,7 @@ services:
   privatebin:
     image: privatebin/nginx-fpm-alpine:latest
     environment:
-      - TZ={{ TZ }}
+      - TZ={{ timezone }}
     volumes:
       - "{{ app_data_dir }}/privatebin/:/srv/data"
       - "{{ app_data_dir }}/privatebin/conf.php:/srv/cfg/conf.php:ro"