Update README.md

Co-authored-by: Joyce Zhu <joycezhu@github.com>

Author: cehfisher

README.md

@@ -126,7 +126,7 @@ Trigger the workflow manually or automatically based on your configuration. The
 | `auth_context`            | No       | If scanned pages require authentication, a stringified JSON object containing username, password, cookies, and/or localStorage from an authenticated session                                        | `{"username":"some-user","password":"***","cookies":[...]}` |
 | `skip_copilot_assignment` | No       | Whether to skip assigning filed issues to GitHub Copilot. Set to `true` if you don't have GitHub Copilot or prefer to handle issues manually                                                        | `true`                                                      |
 | `include_screenshots`     | No       | Whether to capture screenshots of scanned pages and include links to them in filed issues. Screenshots are stored on the `gh-cache` branch of the repository running the workflow. Default: `false` | `true`                                                      |
-| `open_grouped_issues`     | No       | Whether to group filed issues together by violation type. Default: `false` | `true`                                                      |
+| `open_grouped_issues`     | No       | Whether to create a tracking issue which groups filed issues together by violation type. Default: `false` | `true`                                                      |
 | `reduced_motion`          | No       | Playwright `reducedMotion` setting for scan contexts. Allowed values: `reduce`, `no-preference`                                                                                                     | `reduce`                                                    |
 | `color_scheme`            | No       | Playwright `colorScheme` setting for scan contexts. Allowed values: `light`, `dark`, `no-preference`                                                                                                | `dark`                                                      |
 | `scans`                   | No       | An array of scans (or plugins) to be performed. If not provided, only Axe will be performed.                                                                        | `'["axe", "reflow-scan", ...other plugins]'`                                 |