Add credits for wupclient.py

docs/extras/about.md

@@ -28,4 +28,5 @@ This guide was written by staff members of the [Nintendo Homebrew Discord Server
 > - **Dr Clipper**, **ZRicky11**, **dmm** and **FIX94** for <u>Patched IOS80 Installer for vWii</u>.
 > - **djskual**, **Loadiine GX2 Team**, **Yardape** and **brienj** for [WUP Installer GX2](https://sourceforge.net/projects/wup-installer-gx2/).
 > - **koolkdev** for [Wii U NAND Dumper](https://github.com/koolkdev/wiiu-nanddumper).
+> - **dimok789** for [wupclient.py](https://github.com/dimok789/mocha/blob/master/ios_mcp/wupclient.py)
 > - **FIX94** for [Wuphax](https://github.com/FIX94/wuphax).