Bump tensorflow from 1.12.2 to 2.12.1 in /utils (#22)

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 1.12.2 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@v1.12.2...v2.12.1)

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

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utils/requirements.txt

@@ -4,5 +4,5 @@ Pillow==12.2.0
 psutil==5.6.6
 scikit-learn==0.19.1
 six==1.11.0
-tensorflow==1.12.2
+tensorflow==2.12.1
 umap-learn==0.2.3