Bump tensorflow from 2.6.4 to 2.9.3

Bumps [tensorflow](https://github.com/tensorflow/tensorflow) from 2.6.4 to 2.9.3.
- [Release notes](https://github.com/tensorflow/tensorflow/releases)
- [Changelog](https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md)
- [Commits](tensorflow/tensorflow@v2.6.4...v2.9.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ pandas==0.22.0
 python-dateutil==2.7.2
 six==1.11.0
 tensorboard==1.12.0
-tensorflow==2.6.4
+tensorflow==2.9.3
 termcolor==1.1.0
 Werkzeug==0.14.1
 SciPy== 0.13.3