Bump mlflow in /servers/mlflowserver/models/elasticnet_wine

Bumps [mlflow](https://github.com/mlflow/mlflow) from 2.5.0 to 2.12.1.
- [Release notes](https://github.com/mlflow/mlflow/releases)
- [Changelog](https://github.com/mlflow/mlflow/blob/master/CHANGELOG.md)
- [Commits](mlflow/mlflow@v2.5.0...v2.12.1)

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

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

servers/mlflowserver/models/elasticnet_wine/requirements.txt

@@ -1,4 +1,4 @@
-mlflow==2.5.0
+mlflow==2.12.1
 conda-pack==0.6.0
 # pinning protobuf due to https://github.com/mlflow/mlflow/issues/5949
 protobuf<4.0