Bump optuna from 4.1.0 to 4.8.0

Bumps [optuna](https://github.com/optuna/optuna) from 4.1.0 to 4.8.0.
- [Release notes](https://github.com/optuna/optuna/releases)
- [Commits](optuna/optuna@v4.1.0...v4.8.0)

---
updated-dependencies:
- dependency-name: optuna
  dependency-version: 4.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -41,7 +41,7 @@ tensorboard = "2.20.0" # inspection tool for deep learning
 openTSNE = "1.0.2" # fast t-SNE implementation
 SAlib = "1.5.2" # sensitivity analysis library
 scikit-image = "0.25.0" # image processing library
-optuna = "4.1.0" # hyperparameter optimization library
+optuna = "4.8.0" # hyperparameter optimization library
 hyppo = "^0.5.1" # hyppo
 future = "1.0.0" # Comptability between python2/3
 pcntoolkit ="0.33" # PCN Toolkit Framework