Input System: every in-editor help button and "Open Reference" link opens a documentation page that does not exist in 6.7.0

Steps to reproduce:

1. Create a new project on a stream that bundles Input System 6.7.0
2. Install the Input System package via "Window > Package Manager" if it is not already installed
3. In the Project window, select the InputSystem_Actions.inputactions asset
4. In the Inspector, click the help icon labelled "Open Reference for Input Action Importer"
5. Read the page that opens
6. Open "Edit > Project Settings > Input System Package" and click the help icon there
7. Open the Input Actions editor and click its help icon
8. Repeat steps 3 to 7 on a stream that bundles Input System 1.20.0 and compare

Actual results: Every help icon and "Open Reference" link in the package opens Unity's "Sorry... that page seems to be missing!". This covers the Input Actions editor, the Input Action importer Inspector, and the Input System page in Project Settings.

Expected results: Help icons and "Open Reference" links in the Input System open a published documentation page for the installed package version.

Reproducible with versions: 6.7.0 (6000.7.0a6)

Can’t test with versions: All other streams, as logged issues are blocking testing

Tested on (OS): MacBook Pro - Tahoe 26.6.2