🔍 LMR: reduce more on cutnode

[eduherminio]

Test  | search/cutnode-lmr
Elo   | 9.34 +- 4.75 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | 2.90 (-2.25, 2.89) [0.00, 3.00]
Games | 9560: +2797 -2540 =4223
Penta | [221, 1112, 1955, 1173, 319]
https://openbench.lynx-chess.com/test/1022/

Test  | search/cutnode-lmr
Elo   | 1.69 +- 6.92 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=128MB
LLR   | 0.11 (-2.25, 2.89) [0.00, 3.00]
Games | 3496: +850 -833 =1813
Penta | [61, 391, 815, 432, 49]
https://openbench.lynx-chess.com/test/1026/

Slowdown?