docs: fix incorrect link in url-deprecated.mdx (#71787)
## Summary
Delete an incorrect link and update a right link.
### Improving Documentation
- [x] Run `pnpm prettier-fix` to fix formatting issues before opening
the PR.
- [x] Read the Docs Contribution Guide to ensure your contribution
follows the docs guidelines:
https://nextjs.org/docs/community/contribution-guide
---------
Co-authored-by: JJ Kasper <jj@jjsweb.site>
