[ZeroGPU] Update the documentation (#2348)
* ZeroGPU: update the documentation
* Update docs/hub/spaces-zerogpu.md
Co-authored-by: Pierric Cistac <Pierrci@users.noreply.github.com>
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Co-authored-by: Pierric Cistac <Pierrci@users.noreply.github.com>
