Update info of tipo extension

[KohakuBlueleaf]

Info

The original DTG extension repo is now updated and renamed for TIPO project.
The TIPO extension have the backward compatibility of DTG things so I think replace is better choice. (Also, the whole repo is renamed)

extension: https://github.com/KohakuBlueleaf/z-tipo-extension
project: https://github.com/KohakuBlueleaf/KGen
model: https://huggingface.co/KBlueLeaf/TIPO-500M

Checklist:

• I have read the Readme.md
• The description is written in English.
• The index.json and extension_template.json have not been modified.
• The entry is placed in the extensions directory with the .json file extension.