Close the link, otherwise it spans to the bottom of the page

docs/index.md

@@ -59,6 +59,7 @@ hide:
 <section class="index-cta-donate">
   <button class="donate-button">
     <a href="https://opencollective.com/ghcup#category-CONTRIBUTE" class="donate-badge" />
+	</a>
     </button>
 </section>