Added required StableDiffusionPipeline import

bitmind/synthetic_image_generation/synthetic_image_generator.py

@@ -1,6 +1,6 @@
 from transformers import pipeline
 from transformers import set_seed
-from diffusers import StableDiffusionXLPipeline, FluxPipeline
+from diffusers import StableDiffusionXLPipeline, FluxPipeline, StableDiffusionPipeline
 import bittensor as bt
 import numpy as np
 import torch