Add Supported GPUs

The current version of TensorFlow.NET in ML.NET doesn't support the latest GPUs. Add a note in documentation to the prereqs.

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#### Document Details

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* ID: 0495cff9-97a6-68ba-504c-ec7fcbc69a9c
* Version Independent ID: 0c7c0298-37e3-f945-fee5-fc6ccd7a362d
* Content: [How to install GPU support in Model Builder - ML.NET](https://learn.microsoft.com/en-us/dotnet/machine-learning/how-to-guides/install-gpu-model-builder)
* Content Source: [docs/machine-learning/how-to-guides/install-gpu-model-builder.md](https://github.com/dotnet/docs/blob/main/docs/machine-learning/how-to-guides/install-gpu-model-builder.md)
* Product: **dotnet-ml**
* GitHub Login: @luisquintanilla
* Microsoft Alias: **luquinta**