Changes

[[Stockfish#Fishtest|Fishtest]] team did a Regression Tests<ref>https://github.com/glinscott/fishtest/wiki/Regression-Tests Regression Tests, August 2020</ref> in August 2020, exclusively from 40.000 games tests at long time control (60sec + 0.6 for single-core, 30sec + 0.3 for 8 cores tests). The result was used to create the graph of Stockfish progress since version 11. The chart line increases lines increased sharply after merging NNUE.