Fix code example to load bigcode starcoder2 7b
Author: JuanFKurucz
Pull request: yes

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Fixes the issue to load the example code, the model `bigcode/starcoder2-7b_16k` does not exist anymore, it has been renamed to `bigcode/starcoder2-7b` https://huggingface.co/bigcode/starcoder2-7b


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- [X] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).


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Comments:
> Thanks again!
> 
> Would you mind also changing the docstring in [Starcoder2Config](https://huggingface.co/docs/transformers/model_doc/starcoder2#transformers.Starcoder2Config) and the [example](https://huggingface.co/docs/transformers/model_doc/starcoder2#transformers.Starcoder2ForCausalLM) in Starcoder2ForCausalLM to the correct checkpoint?
> 
> Finally, running `make fix-copies` should fix the failing checks.

Sure! Will add the change for the Starcode2Config that i missed out, the other example is coming out from the file I already fixed 👍 

The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_32474). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

@amyeroberts is it ok if the slow CI tests are skipped?

> @amyeroberts is it ok if the slow CI tests are skipped?

Actually seems like the llama fix code issue was fixed elsewhere, rebasing made that thing obsolete. I just updated the PR to check that everything works

Would you mind pushing an empty commit to trigger a new pipeline run? I'm afraid I might have caused the `fetch_tests` test to fail because I tried to re-run jobs from the UI too many times 😅 

> Would you mind pushing an empty commit to trigger a new pipeline run? I'm afraid I might have caused the `fetch_tests` test to fail because I tried to re-run jobs from the UI too many times 😅

Sure will do