Bump the python group with 2 updates (#2185)

Updates the requirements on [tensorflow-cpu](https://github.com/tensorflow/tensorflow) and [tensorflow](https://github.com/tensorflow/tensorflow) to permit the latest version.

Updates `tensorflow-cpu` to 2.18.1
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/v2.18.1/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.18.0...v2.18.1)

Updates `tensorflow` to 2.18.1
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/v2.18.1/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.18.0...v2.18.1)

---
updated-dependencies:
- dependency-name: tensorflow-cpu
  dependency-version: 2.18.1
  dependency-type: direct:production
  dependency-group: python
- dependency-name: tensorflow
  dependency-version: 2.18.1
  dependency-type: direct:production
  dependency-group: python
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 # Tensorflow.
-tensorflow-cpu~=2.18.0;sys_platform != 'darwin'
-tensorflow~=2.18.0;sys_platform == 'darwin'
+tensorflow-cpu~=2.18.1;sys_platform != 'darwin'
+tensorflow~=2.18.1;sys_platform == 'darwin'
 tensorflow-text~=2.18;platform_system != 'Windows'
 
 # Torch.