add: more credit

app.py

@@ -61,6 +61,7 @@ Demo for [WuZongWei6/Pixelization](https://github.com/WuZongWei6/Pixelization)
 
 Models that are used is private to comply with License.
 
+Code forked from [arenatemp/pixelization_inference](https://github.com/arenatemp/pixelization_inference) and [AUTOMATIC1111/stable-diffusion-webui-pixelization](https://github.com/AUTOMATIC1111/stable-diffusion-webui-pixelization), modified to work with spaces.
 
               ''',
               theme=args.theme,