Update donate button

Author: hackerwins

index.html

@@ -88,14 +88,9 @@ <h3>Features</h3>
         <h3>Donate</h3>
         <div class="row">
           <div class="col-sm-12" >
-            <div style="height:24px;margin-bottom:16px;overflow:hidden;">
-              <img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif" style="margin-top:-30px;">
+            <div>
+              <a href="https://opencollective.com/summernote#backers" target="_blank"><img src="https://opencollective.com/summernote/backers.svg?width=890"></a>
             </div>
-            <form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
-              <input type="hidden" name="cmd" value="_s-xclick">
-              <input type="hidden" name="hosted_button_id" value="S8F8AAD3YSD6Q">
-              <input type="submit" name="submit" alt="PayPal - The safer, easier way to pay online!" value="Donate" class="btn-important btn-donate">
-            </form>
           </div>
         </div>
         <h3>Ad</h3>