Fix dutchcoders/transfer.sh#70 mixed content on frontpage

src/index.html

@@ -336,8 +336,8 @@ include "includes/head.html"
             <br>
             <br>
 
-            <iframe src="https://mdo.github.io/github-buttons/github-btn.html?user=dutchcoders&repo=transfer.sh&type=follow&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="250" height="50"></iframe>
-            <iframe src="https://mdo.github.io/github-buttons/github-btn.html?user=dutchcoders&repo=transfer.sh&type=watch&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="200" height="50"></iframe>
+            <iframe src="https://ghbtns.com/github-btn.html?user=dutchcoders&repo=transfer.sh&type=follow&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="250" height="50"></iframe>
+            <iframe src="https://ghbtns.com/github-btn.html?user=dutchcoders&repo=transfer.sh&type=watch&count=true&size=large" allowtransparency="true" frameborder="0" scrolling="0" width="200" height="50"></iframe>
         </div>
     </section>
     <section id="reviews">