Update cert.html

Author: NovaDev404

cert.html

@@ -13,7 +13,7 @@
           <div onclick="window.location.href = 'index.html';" class="sidebar-item">ProStore Installer</div>
           <div onclick="window.location.href = 'cert.html';" class="sidebar-item active">Certificate Manager</div>
           <div onclick="window.location.href = 'dns.html';" class="sidebar-item">Anti-Revoke DNS</div>
-          <div onclick="window.location.href = 'docs/';" class="sidebar-item">Guide</div>
+          <div onclick="window.location.href = 'docs/';" class="sidebar-item">Guide / Docs</div>
         </div>
 
         <div class="panel">