Minor type annotation fix
Author: vwxyzjn
Pull request: yes

# What does this PR do?

Very minor type annotation fix.

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Fixes # (issue)


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Comments:
_The documentation is not available anymore as the PR was closed or merged._

Hi @amyeroberts thanks foe the comment!

```
FAILED examples/pytorch/test_accelerate_examples.py::ExamplesTestsNoTrainer::test_run_glue_no_trainer - AssertionError: 0.6666666666666666 not greater than or equal to 0.75
FAILED examples/pytorch/test_pytorch_examples.py::ExamplesTests::test_run_ner - AssertionError: 0.6674960851669312 not less than 0.5
```

Looks like the CI got the error above. Any thoughts?

The good news is that these failures appear to be unrelated to your PR as I've seen them in other PRs today. The bad news is that we don't know what the issue is yet, looking into it now 🔍 

There's a PR open to resolve the failing tests: https://github.com/huggingface/accelerate/pull/2126

Once that's merged, we'll need to update the CI runners. I'll ping here once that's done and we can rebase and then (hopefully) merge

Great! Thanks @amyeroberts!

@vwxyzjn Could you rebase on main? This should resolve the currently failing tests.

@amyeroberts thanks! I rebased but still seems to have some test case errors... 👀

@vwxyzjn Could you try rebasing again? There were a few (more!) failures because of new package releases which should now be resolved. Sorry to ask you to again. 

@vwxyzjn Thanks again for this contribution and apologies for the issues with the CI 

Thanks @amyeroberts for helping with the PR!