Help button leads to a missing documentation page when clicked on a TMP_Font Asset in the Inspector

How to reproduce:

1. Open the attached "IN-145112_TMP.zip" project
2. In the Project tab, Assets->TextMesh Pro-> Examples & Extras → Fonts
3. Click on Unity SDF1 (TMP_Font_Asset)
4. In the Inspector, click the “?” button in the top right

Actual result: “Sorry... that page seems to be missing!” is displayed
Expected result: Documentation page is displayed without errors

Reproducible with: 6000.3.0a1, 6000.3.17f1
Not reproducible with: 6000.0.77f1, 6000.2.0b2 (2bdac9ac0d74), 6000.4.11f1, 6000.5.0b12, 6000.6.0a7
Fixed in: 6000.6.0a1

Reproducible on: MacOS 26.5 (M1), Windows 11 (by reporter)
Not reproducible on: No other environments tested