[BUGFIX] Typo in sys_log TCA

Wrong table field name in sys_log TCA "detail_nr" instead of
"details_nr" triggers SQL errors in DB check -> Full search module.

Change-Id: I02298019ef29f38def0b6c204236fd6987b92bce
Releases: 6.1, 6.0
Fixes: #45887
Reviewed-on: https://review.typo3.org/18811
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn