*Steps to reproduce:*
# Create a new High Definition 3D project.
# In Window > Package Manager > High Definition RP, download "Material Samples" from the Samples Tab.
# Open "Eye" scene. Click the "eye" link in the Samples Showcase window.
# Open "Hair" scene. Click the "Hair Shading" link in the Samples Showcase window.

*Actual results:* Steps 3&4 links lead to missing pages.

*Expected results:*  No issue with the links in editor window.

*Reproducible with versions:* HDRP 17.0.3 (6000.0.0f1)

*Couldn't test:*  HDRP 17.0.0 (2023.3.0a7), couldn't locate a Samples Showcase window.

*Tested on (OS):* Ubuntu 20.04

*Notes:*
* As this is a link issue, I didn't regression test this much. Please contact ticket reporter if further testing is required.