How to reproduce:
1. Create a new Unity project
2. In the Hierarchy, right-click -> Create Empty
3. In the Inspector, click "Add Component" and add Vertical or Horizontal Layout Group
4. Click the "?" button on the Component and observe the results

Expected results: The documentation opens
Actual results: Documentation is missing

Reproducible with: 6000.4.0b4, 6000.5.0a3
Not reproducible with: 6000.0.64f1, 6000.3.3f1

Reproducible on: macOS Tahoe 26
Not reproducible on: No other environment tested

Note: Not considering it as a regression since the links were never added