fix: revert evergreen webui

Until we can resolve DNS names over HTTPS we can't trust that
someone hasn't hijacked the request, so revert the use of an IPNS
name to get the latest web ui CID.

Refs: https://github.com/ipfs/js-ipfs/issues/2212

src/http/api/routes/webui.js

@@ -30,7 +30,7 @@ module.exports = [
         host = 'gateway.ipfs.io'
       }
 
-      return h.redirect(`${scheme}://${host}:${port}/ipns/webui.ipfs.io`)
+      return h.redirect(`${scheme}://${host}:${port}/ipfs/QmcjeTciMNgEBe4xXvEaA4TQtwTRkXucx7DmKWViXSmX7m`)
     }
   }
 ]