Remove refund copy from public docs

Keysat has no refund functionality — refunds are handled out-of-band in the
payment processor (the v0.3 revoke-on-refund webhook hook is currently a
no-op). Drop refund mentions so the docs do not describe a flow the daemon
does not implement.

index.html

@@ -138,7 +138,7 @@
     <p>You have three options:</p>
 
     <ul>
-      <li><strong>Don&rsquo;t support revocation at all.</strong> Many indie developers do this. Once a key is sold, it stays valid. Refunds are still possible. You send sats back via BTCPay; the key still works but the customer agreed to stop using it.</li>
+      <li><strong>Don&rsquo;t support revocation at all.</strong> Many indie developers do this. Once a key is sold, it stays valid.</li>
       <li><strong>Periodic online check.</strong> Your app fetches a small revocation list from your Keysat (or a CDN you point at it) once a week / month. Adds a "soft-online" requirement.</li>
       <li><strong>Short-lived licenses with renewal.</strong> Issue 30-day licenses; the app fetches a fresh signed token before expiry. Recurring renewals are first-class in v0.2: define a policy with <code>is_recurring=true</code> + <code>renewal_period_days</code> and Keysat handles the cycle (invoice → settle → re-sign → webhook).</li>
     </ul>