Warning about autocorrelate no longer necessary

[MarcosSueiro]

Good news! It seems that ffmpeg version 2025-05-19-git-c55d65ac0a-essentials_build-www.gyan.dev comes with best option for the autocorrelate filter:😊

axcorrelate AVOptions:
size ..F.A...... set the segment size (from 2 to 131072) (default 256)
algo ..F.A...... set the algorithm (from 0 to 2) (default best)
slow 0 ..F.A...... slow algorithm
fast 1 ..F.A...... fast algorithm
best 2 ..F.A...... best algorithm

[retokromer]

The current release is FFmpeg 7.1.1 and the one provided by MediaArea is currently 7.1, therefore the information given in the ReadMe should be updated, in my opinion.