Steps to reproduce:
1. Create new Unity project
2. Open UI Builder window (Window > UI Toolkit > UI Builder)
3. Add “Label” element to Hierarchy
4. Expand “Text” section in Inspector window
5. In “Advanced Text Settings” press on “Learn more” link in help box
Actual results: Pressing “Learn more” link does nothing
Expected results: Unity documentation to “Advanced Text Generator” page should open in browser
Reproducible with versions: 6000.3.7f1, 6000.4.0b7, 6000.5.0a6
Can’t test with versions: 6000.0.66f2 (Advanced Text Generator is not available)
Tested on (OS): Ubuntu 24.04 (reproducing), macOS Silicon Tahoe 26.2 (M1) (not reproducing)