Report minor typo

[lottoian]

https://github.com/libyal/libregf/blob/main/documentation/Windows%20NT%20Registry%20File%20(REGF)%20format.asciidoc#41-named-key

I think row number 4
[Original]
Offset: 10
Size: 8
Description: Last (key) written date and time Contains a FILETIME

could be fix
Offset: 8

Thank you for your hard work

[JiwaniZakir]

I think I see what's going on here. Going to put together a fix.