Update learning rate of notebook attack_adversarial_patch_TensorFlowV2.ipynb

[beat-buesser]

Discussed in https://github.com/Trusted-AI/adversarial-robustness-toolbox/discussions/1383

^{Originally posted by dominic-simon October 29, 2021} As the title states, I'm having issues with the Adversarial Patch Notebook, specifically the TensorFlowV2 notebook. The patch shown on the notebook looks like this:

While mine ends up looking like this:

I have tried running the code from the notebook on both Google Colab and on my own computer, but generate the above patch in both instances. I have also tried multiple different classes for the patch, but the rainbow of colors stays for each different different class.

Am I somehow not copying something correctly? Is there an issue with the version of a relevant library? Is it something else? I'm really not sure, so any help is appreciated. Of course, I'll provide any necessary information to help get to the bottom of this upon request.

Thank you in advance for the assistance!