Bump tensorflow from 2.9.3 to 2.12.1

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.9.3 to 2.12.1.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.9.3...v2.12.1)

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

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

requirements.txt

@@ -2,7 +2,7 @@ numpy==1.22.3
 regex==2021.11.10 
 scikit-learn==1.0.1
 tqdm==4.62.3
-tensorflow==2.9.3
+tensorflow==2.12.1
 h5py==3.6.0
 unidecode==1.3.2
 pydot==1.4.0