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

Author: DeepakRajSundar

xamarin-android/Release-Notes/v27.1.48.md

@@ -0,0 +1,16 @@
+---
+title: Essential Studio for Xamarin.Android 2024 Volume 3 Main Release Release Notes  
+description: Essential Studio for Xamarin.Android 2024 Volume 3 Main Release Release Notes  
+platform: Xamarin.Android
+documentation: ug
+---
+
+# Essential Studio for Xamarin.Android  Release Notes  
+
+{% include release-info.html date="September 17, 2024"  version="v27.1.48" %} 
+
+{% directory path: _includes/release-notes/v27.1.48 %}
+
+{% include {{file.url}} %}
+
+{% enddirectory %}