How to reproduce:
1. Create a new URP Unity project
2. Go to Window -> Package Management -> Package Manager -> Universal Render Pipeline
3. Click on the "Documentation" link
Expected results: The link leads to the working Unity Manual page
Actual results: The link leads to the deprecated Unity Documentation page that only redirects to other sources
Reproducible with: 6000.0.61f1, 6000.2.8f1, 6000.3.0b8, 6000.4.0a4
Reproducible on: macOS Tahoe 26
Not reproducible on: No other environment tested