Bump mlflow from 2.20.2 to 2.20.3 in /lib/python

Bumps [mlflow](https://github.com/mlflow/mlflow) from 2.20.2 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@v2.20.2...v2.20.3)

---
updated-dependencies:
- dependency-name: mlflow
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

lib/python/pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
 test = [
     "black==25.1.0",
     "check-manifest==0.50",
-    "mlflow==2.20.2",
+    "mlflow==2.20.3",
     "pre-commit==4.1.0",
     "pylint==3.3.4",
     "pylint_junit==0.3.5",