[Physics] correct userdoc for convex hull collider parameters.

[profan]

PR Details

Resolves #372.

Description

The userdoc's meaning was the opposite of what it should be to match the current functionality.

Related Issue

Related to #372.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.

[CLAassistant]

All committers have signed the CLA.

[xen2]

Thanks!