Fix nav links

Author: matklad

_layouts/default.html

@@ -20,8 +20,8 @@
   {% if page.url != "/" %}
   <header>
     <a class="nav-link site-title" href="{{ site.baseurl }}/">{{ site.title }}</a>
-    <a class="nav-link" href="/posts/">Posts</a>
-    <a class="nav-link" href="/changelog/">Changelog</a>
+    <a class="nav-link" href="/posts">Posts</a>
+    <a class="nav-link" href="/changelog">Changelog</a>
     <a class="nav-link" href="https://opencollective.com/rust-analyzer/">Sponsor</a>
   </header>
   {% endif %}