Use a token for GitHub authentication

Author: wilkinsona

ci/pipeline.yml

@@ -58,7 +58,7 @@ resources:
  source:
  uri: https://github.com/((github-owner))/((github-repository)).git
  username: ((github-username))
- password: ((github-password))
+ password: ((github-ci-release-token))
  branch: ((branch))
 - name: git-pull-request
  type: pull-request