config: librem5: Update forward matrix for big cam
Took the 0.7331,0.1294,0.1018,0.3039,0.6698,0.0263,0.0002,0.0556,0.7693 matrix and normalized it to the largest value when trying to get rid of pinkish highlights on overexposed areas. Seems to have somehow improved white balance too.
Before / after:
