Update README URLs based on HTTP redirects
Update README URLs based on HTTP redirects

travis-ci/travis-cookbooks,ljharb/travis-cookbooks,ljharb/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,spurti-chopra/travis-cookbooks,spurti-chopra/travis-cookbooks,travis-ci/travis-cookbooks,travis-ci/travis-cookbooks