Adding Sparrow wallet to about page.

frontend/src/app/components/about/about.component.html

@@ -248,6 +248,13 @@
       </div>
     </a>
 
+    <a href="https://www.sparrowwallet.com/download/" target="_blank">
+      <div class="profile_photo d-inline-block" title="Sparrow Wallet">
+        <img class="profile_img" src="/resources/profile/sparrow.png" />
+        Sparrow
+      </div>
+    </a>
+
     <br><br><br>
 
     <h3 i18n="about.alliances">Community Alliances</h3>