Gui Documentation for new incomers: broken link on Introduction

Hello,

 From the page:
https://www.gnustep.org/resources/documentation/Developer/Gui/Reference/Gui.html

Under the section:
Information and Setup

In the sentence:
Nicola Pero has begun work on writing an introduction to the basic 
concepts and use of the GNUstep GUI library.

The link on the word "introduction" has the target:
https://www.gnustep.org/resources/documentation/Developer/Gui/ProgrammingManual/manual_toc.html

But nginx sends a "404 Not Found" error message.

Regards,
Patrick

-- 
Patrick Cardona - Pi400 - GNU/Linux aarch64 (Debian 13.2)
Xorg (1:7.7+24) - libcairo2 (1.18.4-1+rpt1 arm64)
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