Bump keras from 3.12.0 to 3.13.1 in /sdks/python/container/ml/py310 (#37325)

Bumps [keras](https://github.com/keras-team/keras) from 3.12.0 to 3.13.1.
- [Release notes](https://github.com/keras-team/keras/releases)
- [Commits](keras-team/keras@v3.12.0...v3.13.1)

---
updated-dependencies:
- dependency-name: keras
  dependency-version: 3.13.1
  dependency-type: direct:production
...

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Author: dependabot[bot]

sdks/python/container/ml/py310/base_image_requirements.txt

@@ -125,7 +125,7 @@ Js2Py==0.74
 jsonpickle==3.4.2
 jsonschema==4.26.0
 jsonschema-specifications==2025.9.1
-keras==3.12.0
+keras==3.13.1
 keyring==25.7.0
 keyrings.google-artifactregistry-auth==1.1.2
 libclang==18.1.1

sdks/python/container/ml/py310/gpu_image_requirements.txt

@@ -144,7 +144,7 @@ joblib==1.5.3
 jsonpickle==3.4.2
 jsonschema==4.26.0
 jsonschema-specifications==2025.9.1
-keras==3.12.0
+keras==3.13.1
 keyring==25.7.0
 keyrings.google-artifactregistry-auth==1.1.2
 lark==1.2.2