HACK-28 Change publish-snapshot from sh to bash
HACK-28 Change publish-snapshot from sh to bash

- running as sh was receiving 'unexpected operator' error:
  continuous-integration/publish-snapshot.sh: 5: [: amplify-education/hiccup: unexpected operator
- hopefully bash does not run into this issue

amplify-education/hiccup,zackjp/hiccup,amplify-education/hiccup,zackjp/hiccup