Update Dockerfile

Dockerfile

@@ -67,7 +67,7 @@ COPY requirements_HF.txt .
 RUN pip install --no-cache-dir -r requirements_HF.txt && \
     pip install --no-cache-dir gradio ffmpeg-python dlib-bin basicsr 
 
-RUN pip install --no-cache-dir diffusers==0.16.0
+RUN pip install --no-cache-dir diffusers==0.15.0
 RUN pip install --no-cache-dir huggingface-hub==0.25.2
     
 CMD ["python", "app.py"]