message: Fix readme badge
diff: # Verible
  [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
  -[![Continuous Integration](../../workflows/verible-ci/badge.svg)](../../actions/workflows/verible-ci.yml)
  +[![Continuous Integration](https://github.com/google/verible/workflows/verible-ci/badge.svg)](https://github.com/google/verible/actions/workflows/verible-ci.yml)
  <!--*
  freshness: { owner: 'fangism' reviewed: '2020-10-08' }
  