Bump version to 2.8.1

Author: linkdotnet

LinkDotNet.Blog.Web/Shared/AccessControl.razor

@@ -16,7 +16,7 @@
                 <li><h6 class="dropdown-header">Others</h6></li>
                 <li><a class="dropdown-item" href="Sitemap">Sitemap</a></li>
                 <li><hr class="dropdown-divider"></li>
-                <li><a class="dropdown-item" target="_blank" href="https://github.com/linkdotnet/Blog/releases">Version 2.8</a></li>
+                <li><a class="dropdown-item" target="_blank" href="https://github.com/linkdotnet/Blog/releases">Version 2.8.1</a></li>
             </ul>
         </li>
         <li class="nav-item"><a class="nav-link" href="logout">Log out</a></li>