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

Author: DeepakRajSundar

Xamarin/Release-notes/v30.2.6.md

@@ -0,0 +1,16 @@
+---
+title: Essential Studio for  Xamarin.Forms Weekly Nuget Release Release Notes  
+description: Essential Studio for  Xamarin.Forms Weekly Nuget Release Release Notes  
+platform: xamarin
+documentation: ug
+---
+
+# Essential Studio for  Xamarin.Forms  Release Notes  
+
+{% include release-info.html date="August 19, 2025"  version="v30.2.6" %}
+
+{% directory path: _includes/release-notes/v30.2.6 %}
+
+{% include {{file.url}} %}
+
+{% enddirectory %}