Prefer https over http

Fix #6932

src/_includes/stripe-social.html

@@ -19,10 +19,10 @@
 
     <ul class="list-inline">
       <li>
-        <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=FortAwesome&repo=Font-Awesome&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe>
+        <iframe class="github-btn" src="https://ghbtns.com/github-btn.html?user=FortAwesome&repo=Font-Awesome&type=watch&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="100px" height="20px"></iframe>
       </li>
       <li>
-        <iframe class="github-btn" src="http://ghbtns.com/github-btn.html?user=FortAwesome&repo=Font-Awesome&type=fork&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="102px" height="20px"></iframe>
+        <iframe class="github-btn" src="https://ghbtns.com/github-btn.html?user=FortAwesome&repo=Font-Awesome&type=fork&count=true" allowtransparency="true" frameborder="0" scrolling="0" width="102px" height="20px"></iframe>
       </li>
       <li class="follow-btn">
         <a href="https://twitter.com/{{ site.fontawesome.twitter }}" class="twitter-follow-button" data-link-color="#0069D6" data-show-count="true">Follow @{{ site.fontawesome.twitter }}</a>

src/_layouts/base.html

@@ -58,7 +58,7 @@
 
   <script src="https://platform.twitter.com/widgets.js"></script>
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/{{ site.jquery.version }}/jquery.min.js"></script>
-  <script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/{{ site.jquery_validate.version }}/jquery.validate.min.js"></script>
+  <script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/{{ site.jquery_validate.version }}/jquery.validate.min.js"></script>
   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/{{ site.bootstrap.version }}/js/bootstrap.min.js"></script>
   <script src="{{ page.relative_path}}assets/js/tabcomplete.min.js"></script>
   <script src="{{ page.relative_path }}assets/js/site.js"></script>