Wrong TOC entry on Asserting Response page

[Asserting Response](https://hurl.dev/docs/asserting-response.html#asserting-response) TOC entry for [URL redirect](https://hurl.dev/docs/asserting-response.html#url-redirect) is wrong, the section is actually called [Redirects assert](https://hurl.dev/docs/asserting-response.html#redirects-assert).