Updated Links H4 and fix typo
Updated Links H4 and fix typo

Updated links for Circle CI, and updated Shippable link to JFrog (https://jfrog.com/blog/weve-acquired-shippable-to-complete-devops-pipeline-automation-from-code-to-production/). Fixed minor typographical error.
JJ/CC,JJ/CC,JJ/CC,JJ/CC,JJ/CC