Bump mlflow from 1.2.0 to 1.23.1

Bumps [mlflow](https://github.com/mlflow/mlflow) from 1.2.0 to 1.23.1.
- [Release notes](https://github.com/mlflow/mlflow/releases)
- [Changelog](https://github.com/mlflow/mlflow/blob/master/CHANGELOG.rst)
- [Commits](mlflow/mlflow@v1.2.0...v1.23.1)

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

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

Author: dependabot[bot]

requirements.txt

@@ -2,7 +2,7 @@
 scikit-learn==0.21.3
 jieba==0.42.1
 bert4keras==0.5.9
-mlflow==1.2.0
+mlflow==1.23.1
 xgboost==0.90
 lightgbm==2.3.0
 gensim==3.8.1

setup.py

@@ -4,7 +4,7 @@
     long_description = fh.read()
 
 REQUIRED_PACKAGES = [
-    'scikit-learn==0.21.3','jieba==0.42.1',"bert4keras==0.5.9", "mlflow==1.2.0"
+    'scikit-learn==0.21.3','jieba==0.42.1',"bert4keras==0.5.9", "mlflow==1.23.1"
 ]
 
 setuptools.setup(