Look at OnlineMapsEditor.cs (lines 743-760).
You can make your own script which will check the versions of the tiles when the application starts, save the version number in PlayerPrefs, and use it when generating the url of the tiles.

I currently have an application ready and live on the store and suddenly the map stopped working. After looking over the project we detected the latest version of tiles from the online maps component in unity and then rebuild and the map is currently working. Is there a workaround for dynamic update of the tile version or do we have to rebuild and update manually every time?

Thank you in advance!