Specify safetensors version to avoid upstream errors

https://github.com/huggingface/safetensors/issues/142

requirements.txt

@@ -4,7 +4,7 @@ torchsde
 einops
 open-clip-torch
 transformers>=4.25.1
-safetensors
+safetensors>=0.3.0
 pytorch_lightning
 aiohttp
 accelerate