Update README references to extension's property

[es0329]

🚀 Description

A minor README edit.

📄 Motivation and Context

Configuration error using documented property, Unresolved reference: setStyleByPluginType.

🧪 How Has This Been Tested?

Success by referencing the proposed extension property.

📦 Types of changes

• 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 not work as expected)
• Documentation (without implication to logic)

✅ Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[iurysza]

Hey, thanks for that!