Update tensorflow requirement from <2.21.0,>=2.5 to >=2.5,<2.22.0

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](tensorflow/tensorflow@v2.5.0...v2.21.0)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-version: 2.21.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/constraints.txt

@@ -10,7 +10,7 @@ scipy>=1.11.1; python_version >= "3.9"
 sympy>=1.10
 wheel>=0.38.1
 defusedxml>=0.7.1
-tensorflow>=2.5,<2.21.0
+tensorflow>=2.5,<2.22.0
 requests>=2.25.1
 opencv-python>=4.5
 paddlepaddle==3.3.0