Merge branch 'tmccaslin-secret-variable-exclude-paths' into 'master'

Documentation: Add new exclude_paths Secret Detection variable

See merge request gitlab-org/gitlab!39566

doc/user/application_security/secret_detection/index.md

@@ -164,6 +164,7 @@ Secret Detection can be customized by defining available variables:
 |-------------------------|---------------|-------------|
 | `SECRET_DETECTION_COMMIT_FROM` | -     | The commit a Gitleaks scan starts at. |
 | `SECRET_DETECTION_COMMIT_TO` | -       | The commit a Gitleaks scan ends at. |
+| `SECRET_DETECTION_EXCLUDED_PATHS`         | `spec, test, tests, tmp` | Exclude vulnerabilities from output based on the paths. This is a comma-separated list of patterns. Patterns can be globs, or file or folder paths (for example, `doc,spec` ). Parent directories will also match patterns. |
 | `SECRET_DETECTION_HISTORIC_SCAN` | false | Flag to enable a historic Gitleaks scan. |
 
 ### Logging level