Merge pull request #1410 from syncfusion-content/FileAdditionInTOC

Added file reference in toc

Author: SubashiniMahendran

winui-toc.html

@@ -29,6 +29,7 @@
                 Skills
                 <ul>
                     <li><a href="/winui/skills/component-skills">Component Skills</a></li>
+                    <li><a href="/winui/skills/ui-builder-skill">WinUI UI Builder Skill</a></li>
                 </ul>
             </li>
         </ul>