add priority and all.html to sitemap

Author: syphar

templates/core/sitemap.xml

@@ -4,6 +4,12 @@
         <url>
             <loc>https://docs.rs/{{ release.crate_name }}/latest/{{ release.target_name }}</loc>
             <lastmod>{{ release.last_modified | escape_xml }}</lastmod>
+            <priority>1.0</priority>
+        </url>
+        <url>
+            <loc>https://docs.rs/{{ release.crate_name }}/latest/{{ release.target_name }}/all.html</loc>
+            <lastmod>{{ release.last_modified | escape_xml }}</lastmod>
+            <priority>0.8</priority>
         </url>
     {%- endfor %}
 </urlset>