Bump tensorflow

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.6.0 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@v2.6.0...v2.12.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Algorithms and Deep Learning Models/Leukaemia Classification using DL/Requirements.txt

@@ -1,5 +1,5 @@
 numpy==1.24.3
 pandas==1.5.0
 matplotlib==3.6.0
-tensorflow==2.6.0
+tensorflow==2.12.1
 Keras