Added the release notes MD file and corresponding node entry in the TOC.html file

Author: DeepakRajSundar

wpf-toc.html

@@ -2302,7 +2302,7 @@
 							<li><a href="/wpf/release-notes/v31.1.18">v31.1.18</a></li>
 						</ul>
 					</li>
-					<li><a href="/wpf/release-notes/v31.2.2">v31.2.2 Service Pack Release</a></li>
+					<li><a href="/wpf/release-notes/v31.2.9">v31.2.9 Service Pack Release</a></li><li><a href="/wpf/release-notes/v31.2.2">v31.2.2 Service Pack Release</a></li>
 					<li><a href="/wpf/release-notes/v31.1.17">v31.1.17 Main release</a></li>
 				</ul>
 			</li>

wpf/Release-notes/v31.2.9.md

@@ -0,0 +1,16 @@
+---
+title: Essential Studio® for  WPF Release Notes - v31.2.9
+description: Learn here about the controls in the Essential Studio® for  WPF 2025 Volume 3 SP2 Release - Release Notes - v31.2.9
+platform: WPF
+documentation: ug
+---
+
+# Essential Studio® for  WPF - v31.2.9 Release Notes
+
+{% include release-info.html date="November 12, 2025"  version="v31.2.9" %} 
+
+{% directory path: _includes/release-notes/v31.2.9 %}
+
+{% include {{file.url}} %}
+
+{% enddirectory %}