Docs: Adding Branding Guidelines

Bug: 14258160
Change-Id: I587d1772f1bf962d4d2fe51a77db6c69625438b2
diff --git a/src/source/source_toc.cs b/src/source/source_toc.cs
index 175a96f..f1b54b6 100644
--- a/src/source/source_toc.cs
+++ b/src/source/source_toc.cs
@@ -24,6 +24,7 @@
       <li><a href="<?cs var:toroot ?>source/code-lines.html">Codelines, Branches, and Releases</a></li>
       <li><a href="<?cs var:toroot ?>source/build-numbers.html">Codenames, Tags, and Build Numbers</a></li>
       <li><a href="<?cs var:toroot ?>source/roles.html">Project Roles</a></li>
+      <li><a href="<?cs var:toroot ?>source/brands.html">Brand Guidelines</a></li>
       <li><a href="<?cs var:toroot ?>source/licenses.html">Licenses</a></li>
       <li><a href="<?cs var:toroot ?>source/faqs.html">FAQ</a></li>
     </ul>