Update lab04.md

Author: emmanuel-knafo

labs/lab04.md

@@ -3,10 +3,9 @@ In this lab you will reuse workflow templates.
 > Duration: 10-15 minutes
 
 References:
-- [Reusing workflows](https://docs.github.com/en/actions/using-workflows/reusing-workflows)
-- [Sharing workflows with your organization](https://docs.github.com/en/actions/using-workflows/sharing-workflows-secrets-and-runners-with-your-organization)
-- [Sharing actions and workflows with your enterprise](https://docs.github.com/en/enterprise-cloud@latest/actions/creating-actions/sharing-actions-and-workflows-with-your-enterprise)
-- [Using starter workflows](https://docs.github.com/en/actions/using-workflows/advanced-workflow-features#using-starter-workflows)
+- [Gitleaks.io](https://gitleaks.io/)
+- [OWASP Dependency-Check](https://owasp.org/www-project-dependency-check/)
+- [CodeQL](https://codeql.github.com/)
 
 ## 4.1 Secret Scanning with Gitleaks