Updating status code references

[fubar1337]

Shorter domain, more status code support

[vercel]

@fubar1337 is attempting to deploy a commit to the Svelte Team on Vercel.

A member of the Team first needs to authorize it.

[dummdidumm]

What do you mean by "more status code support"? httpstatusdogs is well known and contains all relevant codes for this exercise.

[fubar1337]

http.dog is also well-known, and support 95 status codes (including the new 103 that Chrome supports and 52x which support Cloudflare errors), unlike httpstatusdogs which support 59 status codes. on top of that, the URLs are cleaner/shorter.

please do note that this is just a suggestion, as I assumed feedback and pull requests from the community would be appreciated. if not, then feel free to just ignore and close this pull request and we will never speak of it again :)

[Rich-Harris]

I've found myself using http.dog a bunch lately, so I'm in favour — thanks!