bug: /donate giving HTTP/403 in link checker

[mcdurdin]

e.g.

...
Getting links from: http://localhost:8053/keyboards?q=l:id:mdx-ethi
├─BROKEN─ http://localhost:8053/donate (HTTP_403)
├─BROKEN─ http://localhost:8053/donate (HTTP_403)
├─BROKEN─ http://localhost:8053/donate (HTTP_403)
...

https://github.com/keymanapp/keyman.com/actions/runs/11492617843/job/31986970702

Probably relating to URL rewrite update on donate.keyman.com last week?