It is possible to update an embedded chart in a Word document using an Excel as the data source. These are the steps.
1. Create a new action step by right-clicking on a group and then selecting "Add action step":
2. Under "Manipulating Data" select "Multiple file manipulations" and then click on "Add the selected step to my process":
3. Add a new instruction search for "publish chart data". Select "Publish chart data from Excel":
4. Link the Excel range that contains the chart data as the source  and a Word document with an embedded chard as the target .
Then define the target cell where the data from Excel will be copied into the Word document