Add a redirect for `/links` to the homepage

[sedders123]

Summary

srobo.org/links is going to be on our new business cards. We're currently undecided if we want to display a separate cut down list of links, or just redirect to the homepage. This commit adds the redirect so we can easily change our minds later.

Code review

Testing

• [ ] applied the configuration locally
• [ ] manually validated the new behaviour

Links

https://github.com/srobo/website/issues/483