update app.py: link documentation to remote huggingface url

app.py

@@ -681,7 +681,7 @@ class SpaceGenerator:
             
             For detailed instructions on using ChatUI Helper, please refer to our comprehensive documentation.
             
-            ### 📖 [View Documentation →](docs.md)
+            ### 📖 [View Documentation →](https://huggingface.co/spaces/milwright/chatui-helper/blob/main/docs.md)
             
             The documentation includes:
             - 📖 Quick Start Guide