added the download link to the sticker sheet

Author: Daniela Caicedo

plugin-design-guidelines/ui_resources/Sticker_sheet.md

@@ -1,7 +1,7 @@
 # Resources - Sticker Sheet
 This sticker sheet will cover the different UI surfaces available to plugins. It also includes examples of UI elements and high level guidelines you can use to build your own plugin. Download the latest version from the Plugin Design Assets Github repository. 
 
-### [Download from GitHub](https://github.com/AdobeXD/plugin-design-assets "download from github repo")
+### [Download from GitHub](https://github.com/AdobeXD/plugin-design-assets/blob/master/Sticker_sheet_Plugin_UI_panel.xd?raw=true "download from github repo")
 
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