Reading lists: fix cache header
Reading lists: fix cache header

I missed the header in lists.js when the ones in lists.yaml
were changed; fixing now.

wikimedia/restbase,cscott/restbase,milimetric/restbase,wikimedia/mediawiki-services-restbase,milimetric/restbase,cscott/restbase,wikimedia/restbase,Pchelolo/restbase,Pchelolo/restbase,wikimedia/mediawiki-services-restbase,d00rman/restbase,d00rman/restbase