Update tensorflow requirement in /tests

Updates the requirements on [tensorflow](https://github.com/tensorflow/tensorflow) to permit the latest version.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](https://github.com/tensorflow/tensorflow/commits)

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

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

tests/constraints.txt

@@ -11,7 +11,7 @@ scipy>=1.11.1; python_version >= "3.9"
 wheel>=0.38.1
 defusedxml>=0.7.1
 fastjsonschema~=2.17.1
-tensorflow>=2.5,<2.15.0
+tensorflow>=2.5,<2.16.0
 test-generator==0.1.2
 requests>=2.25.1
 opencv-python>=4.5