Increase increment fraction 1/3 → 3/4

[Aethdv]

Elo   | 7.76 +- 4.81 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.91 (-2.25, 2.89) [0.00, 5.00]
Games | N: 6044 W: 1548 L: 1413 D: 3083
Penta | [50, 634, 1531, 745, 62]

https://asylum.red/test/6073/

Elo   | 7.63 +- 4.55 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=128MB
LLR   | 2.91 (-2.25, 2.89) [0.00, 5.00]
Games | N: 5422 W: 1255 L: 1136 D: 3031
Penta | [19, 524, 1505, 645, 18]

https://asylum.red/test/6075/

Bench: 7080100

[87flowers]

Thanks!