Link of organizations uses a dead link on accessibility statement

[usr110]

All three links point to https://www.pct.bike/tabs/about.html which doesn't exist

Was that intended?

[Robinlovelace]

Well spotted @usr110.

[Robinlovelace]

Heads-up @usr110 I've fixed it here: #856

Tested locally. We can double check on the test server when this is merged (please do so as appropriate, I noticed a superfluous html file in there, heads-up @nikolai-b also, we should have checked for deadlinks introduced by #851 I think).

[Robinlovelace]

Fixed on test server:

Reopening because it's not yet on production.