aks deployment guide update for storage

[devivasudevan]

https://github.com/ai-dynamo/dynamo/blob/main/examples/deployments/AKS/AKS-deployment.md

example:
https://github.com/ai-dynamo/dynamo/blob/d02619b8ee6079c7468936999176dae2076f327c/recipes/deepseek-r1/model-cache/model-cache.yaml#L13

ai-dynamo/dynamo#5581