adding a note about MATLAB current folder (#52)

README.md

@@ -60,6 +60,7 @@ When you use this action, all of the required files must be on the MATLAB search
 `command: addpath("myfolder"), myscript`
 
 ## Notes
+* By default, when you use the **Run MATLAB Command** action, the root of your repository serves as the MATLAB startup folder. To run your MATLAB commands using a different folder, include the `-sd` startup option or the `cd` command in the action.
 * In MATLAB R2019a and later, the **Run MATLAB Command** action uses  the `-batch` option to start MATLAB. Preferences do not persist across different MATLAB sessions launched with the `-batch` option. To run code that requires  the same preferences, use a single action.
 * When you use the **Run MATLAB Command** action, you execute third-party code that is licensed under separate terms.