Trainium spelling nits

[jimburtoft]

What does this PR do?

This PR fulfills my late night need to not go to bed, while also assuaging some minor OCD tendencies.

I came across a misspelling while working on an error with Swin models and felt the need to fix it everywhere, because how can I rest when something somewhere on the Internet is WRONG!

Other than a change to a keyword in setup.py (which probably won't affect anything?), everything else is in comments or error messages.

Fixes # (issue)
If only this could fix some of my issues...

Before submitting

• [ x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[dacorvo]

Thanks for the pull-request 😉 !

[HuggingFaceDocBuilderDev]

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