build(deps): bump keras

Bumps [keras](https://github.com/keras-team/keras) from 2.2.4 to 3.9.0.
- [Release notes](https://github.com/keras-team/keras/releases)
- [Commits](keras-team/keras@2.2.4...v3.9.0)

---
updated-dependencies:
- dependency-name: keras
  dependency-version: 3.9.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

python_tiny_projects/external_projects/TdaToolbox/requirements.txt

@@ -1,5 +1,5 @@
 plotly==3.4.1
-Keras==2.2.4
+Keras==3.9.0
 matplotlib==3.0.2
 tqdm==4.66.3
 numpy==1.22.0