Document gitleaks configuration

.github/workflows/mega-linter.yml

@@ -59,6 +59,7 @@ jobs:
           # ADD YOUR CUSTOM ENV VARIABLES HERE OR DEFINE THEM IN A FILE .mega-linter.yml AT THE ROOT OF YOUR REPOSITORY
           DISABLE: COPYPASTE
           DISABLE_LINTERS: REPOSITORY_GRYPE,REPOSITORY_TRIVY,REPOSITORY_TRUFFLEHOG,SPELL_CSPELL
+          # Scan only changes in PR, otherwise scan everything
           REPOSITORY_GITLEAKS_PR_COMMITS_SCAN: ${{ github.event_name == 'pull_request' }}
 
       # Upload MegaLinter artifacts