Documentation Update

What's changed:

• Removed confusing name property that is no longer returned after running $ az ad sp create-for-rbac with current az CLI (2.60.0)
• Update the env variables to better represent required config based on the returned credentials from $ az ad sp create-for-rbac

Why:

• Current instructions grant the below error

{
  "error":"unauthorized_client",
  "error_description": "AADSTS700016: Application with identifier 'http://azure-cli-2024-xx-xx-xx-xx-xx' was not found in 
    the directory 'Default Directory'. ...
}