docs(config options): clarify silent mode behavior

[HonkingGoose]

Changes

Refactoring:

• Split long sentence into a list
• Move items in list to group similar concepts
• Use emphasis to point out the key points

New info:

• Explain that Renovate also will not update any existing Dependency Dashboard or Config Warning issue
• Give clearer examples of the behavior

Context

A user asked if the maintainers want to make it so Renovate updates an existing Dependency Dashboard, when Renovate runs in silent mode. This proposal was rejected by the lead maintainer.

In any case, the docs should explain the current behavior correctly.

Related discussion:

• Update existing dependency dashboard when `mode=silent` #29848

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 37.440.5 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 37.440.5

Your semantic-release bot 📦🚀