Docs updates

[ethomson]

Summary

Some minor docs updates to clarify the main point in each of the "How Minder Works" components.

Change Type

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[jhrozek]

We should not advertise the --owner flag anymore or tell peopple that they need to be an owner since the switch to the GH app. The rest of the PR looks good.

[ethomson]

Removed - thanks

[coveralls]

coverage: 48.123% (+0.01%) from 48.112%
when pulling b4ce154 on ethomson/docs
into ae4dcdf on main.