[Bug] Pasting text from Google Docs results in bold text

[illright]

Initial checklist

• I agree to follow the code of conduct
• I searched issues and discussions and couldn’t find anything (or linked relevant results below)

Affected packages and versions

7.3.2

Link to runnable example

https://milkdown.dev/playground?text=FTDiHtwcwGwUwAQBNwGMDOCCWmoCc4BDAFwEIQAoIA%3D%3D

Steps to reproduce

1. Create a document in Google Docs with some plain-text, regular font weight content (e.g. Google Docs is great!)
2. Copy that content
3. Go to milkdown.dev and paste it into the editor on the home page
4. See the text appearing as bold, even though it wasn't bold in the source

Expected behavior

The text formatting should be preserved

Actual behavior

The text is bold

Runtime

Chrome

OS

macOS

Build and bundle tools

No response

[illright]

What's interesting is that ProseMirror itself seems to handle this correctly