You can do it in adobe premier pretty easily.

Load the file in and click on interpret - assume frame rate 25. Premier by default is going to assume NTSC frame rates, so you’ll want to make sure it’s either detected 25fps on the source or manually set it to that.

Then change the playback rate to 96% (there is a checkbox option for audio pitch, I believe checking it maintains PAL pitch, I would only check this if your PAL source was already pitch corrected)

Then export at 23.976.

Premier is usually available for a free 30 day, full trial. If you have a good computer system you can bang this out in about 30 minutes start to finish.