Merge branch 'add_DAST_BROWSER_STABILITY_TIMEOUT_documentation_334954' into 'master'

Add documentation for DAST_BROWSER_PAGE_READY_SELECTOR

See merge request gitlab-org/gitlab!75456

doc/user/application_security/dast/browser_based.md

@@ -69,6 +69,7 @@ The browser-based crawler can be configured using CI/CD variables.
 | `DAST_BROWSER_SEARCH_ELEMENT_TIMEOUT`        | [Duration string](https://golang.org/pkg/time/#ParseDuration) | `3s`    | The maximum amount of time to allow the browser to search for new elements or navigations. |
 | `DAST_BROWSER_EXTRACT_ELEMENT_TIMEOUT`       | [Duration string](https://golang.org/pkg/time/#ParseDuration) | `5s`    | The maximum amount of time to allow the browser to extract newly found elements or navigations. |
 | `DAST_BROWSER_ELEMENT_TIMEOUT`               | [Duration string](https://golang.org/pkg/time/#ParseDuration) | `600ms` | The maximum amount of time to wait for an element before determining it is ready for analysis. |
+| `DAST_BROWSER_PAGE_READY_SELECTOR`           | selector | `css:#page-is-ready`                               | Selector that when detected as visible on the page, indicates to the analyzer that the page has finished loading and the scan can continue. Note: When this selector is set, but the element is not found, the scanner waits for the period defined in `DAST_BROWSER_STABILITY_TIMEOUT` before continuing the scan. This can significantly increase scanning time if the element is not present on multiple pages within the site. |        
 
 The [DAST variables](index.md#available-cicd-variables) `SECURE_ANALYZERS_PREFIX`, `DAST_FULL_SCAN_ENABLED`, `DAST_AUTO_UPDATE_ADDONS`, `DAST_EXCLUDE_RULES`, `DAST_REQUEST_HEADERS`, `DAST_HTML_REPORT`, `DAST_MARKDOWN_REPORT`, `DAST_XML_REPORT`,
 `DAST_AUTH_URL`, `DAST_USERNAME`, `DAST_PASSWORD`, `DAST_USERNAME_FIELD`, `DAST_PASSWORD_FIELD`, `DAST_FIRST_SUBMIT_FIELD`, `DAST_SUBMIT_FIELD`, `DAST_EXCLUDE_URLS`, `DAST_AUTH_VERIFICATION_URL`, `DAST_BROWSER_AUTH_VERIFICATION_SELECTOR`, `DAST_BROWSER_AUTH_VERIFICATION_LOGIN_FORM`, `DAST_BROWSER_AUTH_REPORT`,