Merge pull request #408 from tableau/d45-v1.6-relnotes-patch

Update trex_release-notes.md

Author: d45

docs/trex_release-notes.md

@@ -27,11 +27,16 @@ About this release:
 
 ![Tableau Viz SVG image]({{site.baseurl }}/assets/vizapi_demo3.svg)
 
-Starting with version 1.6 of the Dashboard Extensions API library and Tableau 2021.3, you can now add Tableau visualizations to your dashboard extensions. Tableau Viz takes a declarative description of your visualization and renders it as an SVG image that you can embed in your extension.  Version 1.6 of the Dashboard Extensions library adds the [`tableau.extensions.createVizImageAsync`]({{site.baseurl}}/docs/interfaces/extensions.html#createvizimageasync){:target="_blank"} method, which takes the JSON description of the image as an input.<br/> 
+Starting with version 1.6 of the Dashboard Extensions API library and Tableau 2021.3, you can now add Tableau visualizations to your dashboard extensions. Tableau Viz takes a declarative description of your visualization and renders it as an SVG image that you can embed in your extension.  Version 1.6 of the Dashboard Extensions library adds the [`tableau.extensions.createVizImageAsync`]({{site.baseurl}}/docs/interfaces/extensions.html#createvizimageasync){:target="_blank"} method, which takes a JavaScript object describing the image as an input.<br/> 
 For more information about using Tableau Viz, see: <br/>
   - [Add Tableau Viz to Your Dashboard Extensions]({{site.baseurl}}/docs/trex_tableau_viz.html)
   - [Tableau Viz Reference]({{site.baseurl}}/docs/trex_tableau_viz_ref.html)
 
+New Dashboard Extension API methods in this release:
+
+* Added the `getAllDataSourcesAsync()` method to get the data sources for a workbook.
+* Added the `createVizImageAsync()` method to support Tableau Viz.
+
 ----
 
 ### Tableau Dashboard Extensions API version 1.5