Merge pull request #556 from Idein/dependabot/pip/optuna-4.2.1

Bump optuna from 4.2.0 to 4.2.1

Author: yasuyuky

requirements.txt

@@ -4,7 +4,7 @@ matplotlib==3.10.0
 nnoir==1.3.0
 numba==0.61.0
 opencv-python==4.11.0.86
-optuna==4.2.0
+optuna==4.2.1
 pandas==2.2.3
 Pillow-SIMD==9.5.0.post2
 progressbar2==4.5.0