983306: Re-structing the style customization section of File uploader

Author: Yuvan111

blazor-toc.html

@@ -2983,6 +2983,7 @@
 			<li> <a href="/blazor/file-upload/file-source">File Source</a></li>
 			<li> <a href="/blazor/file-upload/template">Template</a></li>
 			<li> <a href="/blazor/file-upload/validation">Validation</a></li>
+			<li> <a href="/blazor/file-upload/form-integration">Form Integration</a></li>
 			<li> <a href="/blazor/file-upload/style-appearance">File Upload Customization</a></li>
 			<li> <a href="/blazor/file-upload/http-client">Http Client</a></li>
 			<li>How To
@@ -5005,4 +5006,4 @@
 					</li>
 					      </ul>
             </li>
-</ul>
+</ul>