Some strings must be protected with double quotes to avoid botio errors

[calixteman]

The strings: https://github.com/arturadib/botio/blob/9434ca0ede20307f7e1d6efa7e9e559240d72f70/lib/module.js#L104-L108 especially the jobInfo.head_ref must be protected. For example if it's foo&bar the ampersand will be interpreted by bash.