The language selector is not working. We are getting ERR_CONNECTION_CLOSED
when fetching jquery-3.3.1.min.js from code.jquery.com. The failure of
jquery is breaking other scripts such as jquery-ui-1.12.1.min.js,
script.js, bootstrap.min.js etc.
This PR changes the head partial to use cached version of
jquery-3.3.1.min.js in hope we fix the language selector issue and
possibly other relate problems.
Qiming Teng
Celeste Horgan