Tune search constants

Tune search constants

STC failed red :
LLR: -2.95 (-2.94,2.94) [0.00,3.50]
Total: 41667 W: 9094 L: 9138 D: 23435
https://tests.stockfishchess.org/tests/view/5df7bb566932658fe9b45253

LTC failed yellow :
LLR: -2.96 (-2.94,2.94) [0.00,3.50]
Total: 113667 W: 18330 L: 18196 D: 77141
https://tests.stockfishchess.org/tests/view/5df562386932658fe9b451c7

VLTC turned green :
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 128630 W: 17747 L: 17273 D: 93610
https://tests.stockfishchess.org/tests/view/5df9054dcde01bf360ab78db

Bench 5180012