Hotfixes to new content

No change in version number as exes remain the same - build 2490 changelog:

LMDh: Minor diffuser baseline lift adjustment (all models); AI calibration pass GT3 Gen2 (all models): Set the LD default final drive to the longer option LeMans 24h / Bugatti : Added missing crowds on garage grandstand; Further LOD and performance tuning; AI line redone for 24h layout (faster, smoother & less late braking) Porsche 963: Adjusted driver animations