build(deps-dev): bump mlflow from 2.19.0 to 2.20.3

Bumps [mlflow](https://github.com/mlflow/mlflow) from 2.19.0 to 2.20.3.
- [Release notes](https://github.com/mlflow/mlflow/releases)
- [Changelog](https://github.com/mlflow/mlflow/blob/master/CHANGELOG.md)
- [Commits](mlflow/mlflow@v2.19.0...v2.20.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -139,7 +139,7 @@ torch = "^2.4"
 pytorch-lightning = "^2.4"
 torchmetrics = "1.6.0"
 torchvision = "0.19.1"
-mlflow = "2.19.0"
+mlflow = "2.20.3"
 
 ## Dev dependencies from HuggingFace
 # TODO: Relax when we deprecate Conversation pipeline