Add a log message when donates are enabled

Needed to count the number of users who actually received
the new config.

```
"logs":[{"message":["Donates enabled"],"level":"log","timestamp":1664702669575}]
```

Co-authored-by: Alexander Borsuk <170263+biodranik@users.noreply.github.com>

src/index.ts

@@ -133,6 +133,8 @@ export async function handleRequest(request: Request) {
       }
 
       if (donatesEnabled) {
+        // To count enabled donations.
+        console.log('Donates enabled');
         if (request.cf?.country == 'RU') {
           response.settings = {
             DonateUrl: DONATE_URL_RU,