fix: update text for leadership-level donors

Author: house-ben

djangoproject/templates/fundraising/includes/display_django_heroes.html

@@ -65,7 +65,7 @@ <h3>{% blocktranslate trimmed with amount=display_logo_amount|intcomma %}
   <p>
     {% blocktranslate trimmed with amount=display_logo_amount|intcomma %}
       Leadership-level donors contribute ${{ amount }} or
-      more in a calendar year.
+      more in total donations.
     {% endblocktranslate %}
   </p>
   <div>