[BUGFIX] Wrong namespaces in Log configuration

Log configuration is still using "TYPO3" as vendor name
instead of "Documentation".

Resolves: #56932
Releases: 0.6
Change-Id: I1e08ddb453a8799eca26146856ee467e7ebfc831
Reviewed-on: https://review.typo3.org/28414
Reviewed-by: Francois Suter
Tested-by: Francois Suter