Bump keras from 3.3.3 to 3.9.0 in /Detection Models/AI_Text_Detector

Bumps [keras](https://github.com/keras-team/keras) from 3.3.3 to 3.9.0.
- [Release notes](https://github.com/keras-team/keras/releases)
- [Commits](keras-team/keras@v3.3.3...v3.9.0)

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

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

Author: dependabot[bot]

Detection Models/AI_Text_Detector/requirements.txt

@@ -3,4 +3,4 @@ tensorflow==2.16.1
 scikit-learn==1.4.2
 numpy==1.26.4
 pandas==2.2.2
-keras==3.3.3
+keras==3.9.0