docs: workaround nested list format conflict

[SnakeDoc]

Changes

Applies a workaround to a nested list format conflict between prettier and markdownlint, first identified in #30569.

I excluded any nested list that was part of a codeblock, found in __fixtures__, found in docs/ and anywhere not used by mkdocs to generate html for the renovate website. Let me know if my exclusions are incorrect.

Context

A more permanent solution is being tracked in #30608.

This PR is to address the formatting issue until #30608 is resolved.

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This issue has been resolved in version 38.39.6 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 38.39.6

Your semantic-release bot 📦🚀