Adding changes to Stamps.md file

Author: Nandhakumar-SF4686

MAUI/PDF-Viewer/Stamps.md

@@ -176,7 +176,7 @@ void EditSelectedStampAnnotation(Annotation selectedAnnotation)
 {% endhighlight %}
 {% endtabs %}
 
-N> Changing the color of a stamp annotation after it has been added to a PDF is not supported, due to the predefined nature of standard stamps. These stamps use fixed colors to maintain consistency and convey distinct meanings. To work around this limitation, you can use the stamp with specific color, by creating [Custom stamp](Stamp Annotations in .NET MAUI PDF Viewer control | Syncfusion). Custom stamps allow users to design and apply stamps with user-defined colors and texts.
+N> Changing the color of a stamp annotation after it has been added to a PDF is not supported, due to the predefined nature of standard stamps. These stamps use fixed colors to maintain consistency and convey distinct meanings. To work around this limitation, you can use the stamp with specific color, by creating [Custom stamp](https://help.syncfusion.com/maui/pdf-viewer/stamps#add-custom-stamps-using-the-toolbar). Custom stamps allow users to design and apply stamps with user-defined colors and texts.
 
 ## Custom stamp modal view