Bump keras from 3.8.0 to 3.9.0

Bumps [keras](https://github.com/keras-team/keras) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/keras-team/keras/releases)
- [Commits](keras-team/keras@v3.8.0...v3.9.0)

---
updated-dependencies:
- dependency-name: keras
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Diff for: requirements_with_versions.txt

@@ -41,7 +41,7 @@ tornado==6.4.2
 obs==0.0.0
 todo==0.1
 oauth2client==4.1.3
-keras==3.8.0
+keras==3.9.0
 pymongo==4.11.2
 playsound==1.3.0
 pyttsx3==2.98