Bump mlflow from 1.15.0 to 1.23.1

Bumps [mlflow](https://github.com/mlflow/mlflow) from 1.15.0 to 1.23.1.
- [Release notes](https://github.com/mlflow/mlflow/releases)
- [Changelog](https://github.com/mlflow/mlflow/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/mlflow/mlflow/compare/v1.15.0...v1.23.1)

---
updated-dependencies:
- dependency-name: mlflow
  dependency-type: direct:production
...

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

requirements-tests.txt

@@ -3,7 +3,7 @@ hyperopt==0.2.5
 lightgbm==3.1.0
 matplotlib==3.4.1
 microsoft-bonsai-api==0.1.3
-mlflow==1.15.0
+mlflow==1.23.1
 natsort==7.1.0
 numpy==1.19.5
 optuna==2.6.0

requirements.txt

@@ -14,7 +14,7 @@ lightgbm==3.1.0
 # hyperopt==0.2.5
 # optuna==2.6.0
 # scikit-optimize==0.8.1
-mlflow==1.15.0
+mlflow==1.23.1
 rich==9.13.0
 hydra-core==1.0.5
 natsort==7.1.0