Fix git-lfs command typo in docs (huggingface#4586)

fix typo in git-lfs command

added missing hyphen. "git lfs" is not a command

Author: clairefro

docs/source/en/using-diffusers/loading.md

@@ -65,7 +65,7 @@ pipe = StableDiffusionImg2ImgPipeline.from_pretrained(repo_id)
 To load a diffusion pipeline locally, use [`git-lfs`](https://git-lfs.github.com/) to manually download the checkpoint (in this case, [`runwayml/stable-diffusion-v1-5`](https://huggingface.co/runwayml/stable-diffusion-v1-5)) to your local disk. This creates a local folder, `./stable-diffusion-v1-5`, on your disk:
 
 ```bash
-git lfs install
+git-lfs install
 git clone https://huggingface.co/runwayml/stable-diffusion-v1-5
 ```
 
@@ -466,4 +466,4 @@ Every pipeline expects a `model_index.json` file that tells the [`DiffusionPipel
     "AutoencoderKL"
   ]
 }
-```
+```