Update documentation about selectors

[jaimergp]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

Current docs do not consider arm64 to be a valid architecture selector for Windows (only for macOS).

There might be some other outdated or missing fields too (can't you use anything defined in conda_build_config.yaml?). References:

• conda-build/conda_build/metadata.py

  Line 82 in 313fb69

  def get_selectors(config: Config) -> dict[str, bool]:

• Examples of selectors in conda-forge

Conda Info

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Conda Config

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Conda list

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Additional Context

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[github-actions]

Hi there, thank you for your contribution!

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Thanks!

[jaimergp]

Still an issue afaik