Bump flask in /test/sagemaker_tests/autogluon/training

Bumps [flask](https://github.com/pallets/flask) from 1.1.1 to 3.1.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.1...3.1.3)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

test/sagemaker_tests/autogluon/training/requirements.txt

@@ -3,7 +3,7 @@ protobuf>=3.20,<3.21
 sagemaker>=2.187,<3
 coverage
 flake8==3.7.7
-Flask==1.1.1
+Flask==3.1.3
 mock
 pytest
 pytest-cov