Docs: Adding Block-based OTAs and verified boot to index, nav

Bug: 17884100
Change-Id: I40576dc7c5dbf058f8798d060975fac425d408bc
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index ebb8d8b..05a51d3 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -315,6 +315,7 @@
             </div>
             <ul>
               <li><a href="<?cs var:toroot ?>devices/tech/security/secureboot/verified-boot.html">Verified boot</a></li>
+              <li><a href="<?cs var:toroot ?>devices/tech/security/secureboot/block-ota.html">Block-based OTA</a></li>
             </ul>
           </li>
           <li class="nav-section">