VFX Graph Node documentation icon is pixelated

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Visual Effects package
3. Create a new VFX Graph (Assets > Create > Visual Effects > Visual Effect Graph)
4. Open the VFX Graph
5. Open the Create Node popup
6. Click the "Show Details Panel" button
7. Select any Node from the Context folder
8. Observe the documentation icon in the details panel

Actual results: The documentation icon is pixelated

Expected results: The documentation icon is high definition

Reproducible with versions: 6000.0.58f1, 6000.2.6f1, 6000.3.0b3, 6000.4.0a1

Tested on (OS): Ubuntu 24.04, macOS Silicon Sequoia 15.6.1