Fix Missing Import and Path Discrepancy in Demo and README

[0LEL0]

It seems there are a couple of discrepancies in the demo and documentation:

1. The demo code appears to be missing the import statement for Resampling from PIL.Image. Adding from PIL.Image import Resampling should resolve this.

2. In the README.md, the argument --normal_image_path 'data/controlnet_condition/00000_0_0002.png' seems incorrect. It should instead be --normal_image_path 'data/controlnet_conditions/00000_0_0002.png' (note the extra "s" in controlnet_conditions).

Could these be addressed for consistency and functionality? Thank you!