HelpBox visuals in the "Ray Tracing Shader" asset are not aligned with the latest style guide

Steps to reproduce:

1. Create a new project
2. Go to "Assets" -> "Create" -> "Shader" > "Ray Tracing Shader"
3. Select the newly created asset in the "Project" window
4. Go to the "Inspector" window and observe the displayed help box

Actual results: The icon is too big

Expected results: The icon should be smaller

Reproducible with versions: 6000.5.0a3

Tested on (OS): macOS - Tahoe 26.1

Notes: New UI changes are valid from U6.5