build(deps): bump mlflow in /tests/data/serve_resources/mlflow/xgboost (#5218)

Bumps [mlflow](https://github.com/mlflow/mlflow) from 2.13.2 to 3.1.0.
- [Release notes](https://github.com/mlflow/mlflow/releases)
- [Changelog](https://github.com/mlflow/mlflow/blob/master/CHANGELOG.md)
- [Commits](mlflow/mlflow@v2.13.2...v3.1.0)

---
updated-dependencies:
- dependency-name: mlflow
  dependency-version: 3.1.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: parknate@ <[email protected]>

Author: dependabot[bot]

tests/data/serve_resources/mlflow/xgboost/requirements.txt

@@ -1,4 +1,4 @@
-mlflow==2.13.2
+mlflow==3.1.0
 lz4==4.3.2
 numpy==1.26.4
 pandas==2.0.3