Achieved with the support of https://github.com/YOU54F/cypress-slack-reporter creator.
Create a Slack Incoming Webhook
https://api.slack.com/messaging/webhooks#getting_started
Select: GitHub > Settings > Secrets Click: New repository secret
- Name: SLACK_WEBHOOK_URL
- Value: {taken from Slack Webhook}
Select: Actions > Cypress Slack notify > Run workflow > master Click: Run workflow