Same weight for black and white nonPawnCorrection history

[pb00068]

Since we don't have color dependent parameters in NNue eval (please correct me if I'm wrong),
it also has no sense IMO to have color dependent parameters in correction histories,

Ideally a fixed depth search on a single thread should be determistic,
so delivering the same result (move) if we just flip colors on the board.

Patch replaces 2 parameters (122 and 185) with just one value 154 (= the avg of the two).

Passed STC-non regression
https://tests.stockfishchess.org/tests/view/6740a63286d5ee47d953f656
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 122336 W: 31499 L: 31372 D: 59465
Ptnml(0-2): 336, 14535, 31301, 14658, 338

Passed LTC-non regression
https://tests.stockfishchess.org/tests/view/67419bae86d5ee47d953f7b6
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 101400 W: 25870 L: 25731 D: 49799
Ptnml(0-2): 78, 11109, 28166, 11290, 57

bench: 850104

[github-actions]

clang-format 18 needs to be run on this PR.
If you do not have clang-format installed, the maintainer will run it when merging.
For the exact version please see https://packages.ubuntu.com/noble/clang-format-18.

(execution 11997250258 / attempt 1)

[dav1312]

Note that you are still not getting correctly marked as a contributor by github due to the email that you use in your commits