Update index.html

Author: resmo

index.html

@@ -73,11 +73,11 @@ <h2>
         </section>
 
         <aside id="sidebar">
-          <a href="https://github.com/git-ftp/git-ftp/zipball/master" class="button">
+          <a href="https://github.com/git-ftp/git-ftp/zipball/develop" class="button">
             <small>Download</small>
             .zip file
           </a>
-          <a href="https://github.com/git-ftp/git-ftp/tarball/master" class="button">
+          <a href="https://github.com/git-ftp/git-ftp/tarball/develop" class="button">
             <small>Download</small>
             .tar.gz file
           </a>