Update get_started_keras.py, adversarial_training_cifar10.py

[Foxglove144]

Description

1. Fix AttributeError: 'Adam' object has no attribute 'get_updates' in get_started_keras.py
2. Disable Tensorflow eager execution in adversarial_training_cifar10.py

Fixes # (issue)

Type of change

Please check all relevant options.

• Improvement (non-breaking)
• Bug fix (non-breaking)
• New feature (non-breaking)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Testing

Please describe the tests that you ran to verify your changes. Consider listing any relevant details of your test configuration.

• Test A
• Test B

Test Configuration:

• OS
• Python version
• ART version or commit number
• TensorFlow / Keras / PyTorch / MXNet version

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov-commenter]

Codecov Report

Merging #2188 (d86f158) into main (4a317e8) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main    #2188   +/-   ##
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  Coverage   85.63%   85.63%           
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  Files         297      297           
  Lines       26520    26520           
  Branches     4864     4864           
=======================================
  Hits        22711    22711           
  Misses       2571     2571           
  Partials     1238     1238           

[beat-buesser]

Hi @Foxglove144 Thank you very much for your pull request and updating the examples of ART!