Update donate-crypto

Author: tobihagemann

layouts/partials/donate-crypto.html

@@ -6,7 +6,7 @@
     <input type="hidden" name="merchant" value="963d3aa90995dc5542113e7801e31e2a" />
     <input type="hidden" name="item_name" value="Cryptomator Donation" />
     <input type="hidden" name="want_shipping" value="0" />
-    <input type="hidden" name="amountf" value="15" />
+    <input type="hidden" name="amountf" value="20" />
     <input type="hidden" name="currency" value="EUR" />
     <input type="hidden" name="allow_amount" value="1" />
     <input type="hidden" name="success_url" value="{{ "/donate/thanks" | absURL }}" />