dreambooth docs torch.compile note (huggingface#3471)

* dreambooth docs torch.compile note

* Update examples/dreambooth/README.md

Co-authored-by: Sayak Paul <[email protected]>

* Update examples/dreambooth/README.md

Co-authored-by: Pedro Cuenca <[email protected]>

---------

Co-authored-by: Sayak Paul <[email protected]>
Co-authored-by: Pedro Cuenca <[email protected]>

Author: 3 people

examples/dreambooth/README.md

@@ -43,6 +43,8 @@ from accelerate.utils import write_basic_config
 write_basic_config()
 ```
 
+When running `accelerate config`, if we specify torch compile mode to True there can be dramatic speedups. 
+
 ### Dog toy example
 
 Now let's get our dataset. For this example we will use some dog images: https://huggingface.co/datasets/diffusers/dog-example.