Fix wording in torchscript.md

[Madghostek]

What does this PR do?

This PR improves documentation by fixing a small typo.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case. (doesn't apply)
• Did you make sure to update the documentation with your changes? Here are the
  documentation guidelines, and
  here are tips on formatting docstrings.
• Did you write any new necessary tests? (doesn't apply)

Who can review?

Anybody, this is a very minor change.

[github-actions]

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[Rocketknight1]

Yes, thank you for the fix!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.