Fix MarkDown syntax
Author: cyyever
Pull request: yes

# What does this PR do?

This PR provides more fixes to the markdown files.

## 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 read the [contributor guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#create-a-pull-request),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the [forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes? Here are the
      [documentation guidelines](https://github.com/huggingface/transformers/tree/main/docs), and
      [here are tips on formatting docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag
members/contributors who may be interested in your PR.

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Comments:
The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_41676). All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

@Rocketknight1 the new links seem to load the notebook but the notebooks have not been verified and throw errors. @fan-amd can you please comment since you made the original PR for the first set of notebooks? We should definitely revert this and only approve once we verify the notebooks by running all cells.

I tried some of the links and they worked, but not all of them were checked.

Hi, @cyyever @Rocketknight1 Thank you so much and welcome your support for the AMD platform.  Original PR for the first set of notebooks is https://github.com/huggingface/transformers/pull/41126 . Five notebook links have been verified on AMD dev cloud and the others are being tested and supported. The new links do not seem to have been tested yet. I think should revert this and only approve when the links have been verified.

AMD links were added in `notebooks/README.md`, other file changes are not need to be reverted.

My bad, I shouldn't have approved those changes! I didn't realize only some of the notebooks were working successfully on AMD dev cloud