[Doc] Can't find "Integrated OpenTitan: Design for Test and Debug Suppor" in the documentaion

### Description

Hello everyone,

Based on this page here: https://opentitan.org/book/hw/ip/soc_dbg_ctrl/index.html

It seems there is a missing reference to a document names: Integrated OpenTitan: Design for Test and Debug Suppor

Anyboy can help to find it?

Thanks in advance!

Start with the soc_dbg_ctrl documentation page at https://opentitan.org/book/hw/ip/soc_dbg_ctrl/index.html and check its references for the document titled “Integrated OpenTitan: Design for Test and Debug Suppor”. Done means determining whether the document exists and, if so, adding or correcting its reference; the issue provides no repository file or test name.

Written by the indexing model from the issue text.