[zabojeb]

What does this PR do?

Fixes typos in code example of GPT2 that was making code not runnable - link

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• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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[ArthurZucker]

Thanks for the PR, and sorry it didn't make it in! This branch is based on v4, and v5 is very different, so rather than rebasing we'd love to invite you to open a new PR against main using our latest tools and good practices:

• Transformers tenets
• mlinter and the modeling rules it enforces (make typing)
• Modular transformers
• Contributing guide

Closing this one in the meantime, thanks again!