Adding OPS_GITHUB_ACTIONS_WEBHOOK for Slack notification of failures

Author: greg-at-moderne

.github/workflows/ci.yml

@@ -23,6 +23,7 @@ env:
   GRADLE_ENTERPRISE_ACCESS_KEY: ${{ secrets.gradle_enterprise_access_key }}
   GRADLE_ENTERPRISE_CACHE_USERNAME: ${{ secrets.gradle_enterprise_cache_username }}
   GRADLE_ENTERPRISE_CACHE_PASSWORD: ${{ secrets.gradle_enterprise_cache_password }}
+  OPS_GITHUB_ACTIONS_WEBHOOK: ${{ secrets.OPS_GITHUB_ACTIONS_WEBHOOK }}
   RELEASE_BUILD: "true"
   CI: true