fix(partials/sidebar): Use more semantic elements

Author: sorin-davidoi

layouts/partials/sidebar.html

@@ -1,4 +1,4 @@
-<div class="sidebar">
+<aside class="sidebar">
   <div class="container sidebar-sticky">
     <div class="sidebar-about">
       <a href="{{ .Site.BaseURL }}"><h1>{{ .Site.Title }}</h1></a>
@@ -7,13 +7,15 @@
       </p>
     </div>
 
-    <ul class="sidebar-nav">
-      <li><a href="{{ .Site.BaseURL }}">Home</a> </li>
-      {{ range .Site.Menus.main -}}
-        <li><a href="{{.URL}}"> {{ .Name }} </a></li>
-      {{- end }}
-    </ul>
+    <nav>
+      <ul class="sidebar-nav">
+        <li><a href="{{ .Site.BaseURL }}">Home</a> </li>
+        {{ range .Site.Menus.main -}}
+          <li><a href="{{.URL}}"> {{ .Name }} </a></li>
+        {{- end }}
+      </ul>
+    </nav>
 
     <p>{{ with .Site.Params.copyright }}{{.}}{{ else }}&copy; {{ now.Format "2006"}}. All rights reserved. {{end}}</p>
   </div>
-</div>
+</aside>