Update to PHP8 and Virtuemart

[Kuubs]

was already found by Stefan and IMHO is fixed in the latest RC version

https://dev.virtuemart.net/attachments/download/1340/com_virtuemart.4.0.7.10732_package_or_extract.zip

I tried updating to the newest Virtuemart 4.0.7 but that doesn't fix the issue.

meaningless ... pls use the full version numbers otherwise we waste our time chasing bugs that are already fixed

It's 10732 im running