Add missing settings to README
This PR adds a few missing settings to the README.
Please review: @NUWAN.KUMARASIRI @TREFILEK @bjsousa
Improve security with one click by enabling Secret Push Protection for your projects: https://docs.gitlab.com/ee/user/application_security/secret_detection/secret_push_protection/#enable-secret-push-protection-in-a-project
This PR adds a few missing settings to the README.
Please review: @NUWAN.KUMARASIRI @TREFILEK @bjsousa