Use esp types in peripheral docs

[MabezDev]

Thank you for your contribution!

We appreciate the time and effort you've put into this pull request.
To help us review it efficiently, please ensure you've gone through the following checklist:

Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
• I have used cargo xtask fmt-packages command to ensure that all changed code is formatted correctly.
• My changes were added to the CHANGELOG.md in the proper section.
• I have added necessary changes to user code to the Migration Guide.
• My changes are in accordance to the esp-rs API guidelines

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• I have read the CONTRIBUTING.md guide and followed its instructions.

This has bothered me for too long.

[bugadani]

This is the equivalent of changing a few names in your homework so that it doesn't look like you copied your friends' work 🤣

[bjoernQ]

Thanks! I stumbled upon this a few times but immediately forgot about it afterwards