It looks like jQuery versions get updated occasionally in that repo, but you'll have to check and see when 1.7 gets put in.
My recommendation would be to maintain dependency versions yourself, i.e. download the version of jQuery you want to use and //= require jquery in application.js - then grab a new version of jQuery whenever you want it updated
My recommendation would be to maintain dependency versions yourself, i.e. download the version of jQuery you want to use and //= require jquery in application.js - then grab a new version of jQuery whenever you want it updated