docs: add --check-redirects flag for mint broken-links

Generated-By: mintlify-agent

Author: mintlify[bot]

cli/commands.mdx

@@ -205,6 +205,7 @@ The command excludes files matching [.mintignore](/organize/mintignore) patterns
 | --- | --- |
 | `--check-anchors` | Also validate anchor links (for example, `/page#section`) against heading slugs. |
 | `--check-external` | Also check external URLs for broken links. |
+| `--check-redirects` | Also check that redirect destinations in `docs.json` resolve to valid paths. |
 | `--check-snippets` | Also check links inside `<Snippet>` components. |
 
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