Update wording

theme/templates/donate.html.j2

@@ -143,7 +143,7 @@
           <p>
             {% trans %}Raise awareness of the Funkwhale project and look good doing it with our line of clothing and accessories.{% endtrans %}
           </p>
-          <p>{% trans %}10% from each purchase goes to support the Funkwhale project directly.{% endtrans %}</p>
+          <p>{% trans %}A portion of each purchase goes to support the Funkwhale project directly.{% endtrans %}</p>
           <a href="https://funkwhale.myspreadshop.de/"
              class="funkwhale button is-colored is-primary">{% trans %}Visit the store{% endtrans %}</a>
         </div>