HelpBox visuals in the "Light Probe Group" component are not aligned with the latest style guide

Steps to reproduce:

1. Create a project using the Universal 2D template
2. Select "Main Camera" in the "Hierarchy"
3. Click "Add Component" in the "Inspector" window
4. Find the "Light Probe Group" component and add it
5. Observe the help box UI

Actual results: The icon is too big. Text has bolded elements.

Expected results: The icon should be smaller. No bolded elements.

Reproducible with versions: 6000.5.0a3

Tested on (OS): macOS - Tahoe 26.1

Notes: New UI changes are valid from U6.5