To add a table to an Update you will first need to add in a text field as shown below:
Next, you will want to highlight text that will be used in your table and navigate to the "table" icon on the text editor as shown below:
Click the table icon and select the dimensions of your table as shown below. Note: the table will automatically go the width of the text field.
Now you will be able to enter in the correct data throughout the table.