I had the same query and spoke to the technician at my local dealer since I'd had a new battery and upgrade as part of another fix (SOS unit). Apparently '2.4 update' is identified as '2.3' in the vehicle. Seems like VW have some serious issues with their software management.
I was trying to get 3.0 (which the VW website seemed to imply was available), so checked. I'm all in favour of verifying the functionality and compatibility of the new release (hope the sort out the charging scheduler), but it's becoming as much a PR disaster as Gridserve's 2 vehicle dynamic charging