Bump tensorflow from 1.12.0 to 2.12.1

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 1.12.0 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@v1.12.0...v2.12.1)

---
updated-dependencies:
- dependency-name: tensorflow
  dependency-version: 2.12.1
  dependency-type: direct:production
...

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Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 pygame==1.9.4
 pillow==5.3.0
 keras==2.1.2
-tensorflow==1.12.0
+tensorflow==2.12.1
 matplotlib==3.0.1
 pandas==0.23.4
 scikit-learn==0.20.1