fix(neuronx): bump diffusers version

Diffusers versions <= 0.29.0 are now incompatible with the latest
huggingface_hub (0.26).

Author: dacorvo

huggingface/pytorch/inference/docker/2.1/py3/sdk2.20.0/Dockerfile.neuronx

@@ -20,7 +20,7 @@ ARG NEURONX_TOOLS_VERSION=2.19.0.0
 
 # HF ARGS
 ARG TRANSFORMERS_VERSION
-ARG DIFFUSERS_VERSION=0.28.2
+ARG DIFFUSERS_VERSION=0.30.3
 ARG OPTIMUM_NEURON_VERSION=0.0.25
 ARG SENTENCE_TRANSFORMERS=3.0.1
 ARG PEFT_VERSION=0.12.0