mention mobile in the release note about pinch-to-zoom

Author: tony-xlh

releasenotes/index.md

@@ -20,7 +20,7 @@ permalink: /releasenotes/index.html
 * Improved the rendering of selected annotations by reducing the number of items to draw.
 * Improved the performance of selecting multiple annotations.
 * Added a consistency check between the JavaScript and resource file versions.
-* Added support for pinch-to-zoom under the `textSelection` mode of `EditViewer`.
+* Added support for pinch-to-zoom under `textSelection` mode of `EditViewer` for mobile.
 
 ### Bug Fixes