fix mdformat admonition conflict (464)

[fyliu]

Fixes #464

What changes did you make?

• Pinned mdformat-mkdocs to minimum 4.1.2
• Removed mdformat-admon
• Committed auto-updated md files

Why did you make the changes (we will use this info to test)?

• Pinning causes developer machines to update to the current version.
• Removing mdformat-admon resolves the conflict.
• The md file updates makes the md files more readable in text form

Testing suggestion

To show that it fixes the problem for pre-commit.ci, my preview repo commit log shows pre-commit failing before and passing after the changes. (click on the small X and check mark for link to detailed output)

1. Run pre-commit on all files (should setup mdformat-mkdocs again and pass all checks)

   pre-commit run --all-files
   

2. Check new site for changed md files rendering (the pages should look the same (boxes, dropdowns, tabs))

   • current site
   • preview site

[del9ra]

Hi Fang, Thanks for your contribution! Everything works perfectly.