Update winui-toc.html

Author: kavinkumarrajendran

winui-toc.html

@@ -693,6 +693,7 @@
 			<ul>
 				<li> Weekly Nuget Release 
 					<ul>
+						<li><a href="/winui/release-notes/v31.2.18">v31.2.18</a></li>
 						<li><a href="/winui/release-notes/v31.2.16">v31.2.16</a></li>
 					    <li><a href="/winui/release-notes/v31.2.15">v31.2.15</a></li>
 						<li><a href="/winui/release-notes/v31.2.10">v31.2.10</a></li>