Copy suggestions about revisions, branches and neuronx version (#2)

- Copy suggestions about revisions, branches and neuronx version (5685b12193b1abb75e40a6dafc3d2d3b2c710d70)


Co-authored-by: Jeff Boudier <jeffboudier@users.noreply.huggingface.co>

README.md

@@ -29,6 +29,8 @@ image = stable_diffusion(prompt).images[0]
 image.save("generated_image.jpg")
 ```
 
+This repository contains branches specific to versions of neuronx. When using with optimum-neuron, use the repo revision specific to the version of neuronx you are using, to load the right serialized checkpoints.
+
 ## Compilation Arguments
 
 **compilation arguments**