Revert "Revert "Use https in the sitemap""

This reverts commit f2f7288.

sitemap.xml

@@ -5,20 +5,20 @@ layout:
 <urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   {% for post in site.posts %}
     <url>
-      <loc>http://jhipster.github.io{{ post.url }}</loc>{% if post.lastmod != null %}
+      <loc>https://jhipster.github.io{{ post.url }}</loc>{% if post.lastmod != null %}
       <lastmod>{{ post.lastmod | date_to_xmlschema }}</lastmod>{% endif %}
       <changefreq>daily</changefreq>
       <priority>0.5</priority>
     </url>
   {% endfor %}
   <url>
-      <loc>http://jhipster.github.io/presentation</loc>
+      <loc>https://jhipster.github.io/presentation</loc>
       <changefreq>daily</changefreq>
       <priority>0.6</priority>
   </url>
   {% for page in site.pages %}{% if page.sitemap != null and page.sitemap != empty and page.sitemap.priority != null and page.url  %}
       <url>
-        <loc>http://jhipster.github.io{{ page.url }}</loc>{% if page.sitemap.lastmod != null %}
+        <loc>https://jhipster.github.io{{ page.url }}</loc>{% if page.sitemap.lastmod != null %}
         <lastmod>{{ page.sitemap.lastmod | date_to_xmlschema }}</lastmod>{% endif %}
         <changefreq>daily</changefreq>
         <priority>{{ page.sitemap.priority }}</priority>