az ad sp create-for-rbac is missing --name (-n) argument description.

Would be helpful to have a description under "optional arguments". I saw it in examples but had to experiment to find the right form for the name. I expected that info in argument description.

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* ID: e99d25ff-03e2-e015-37f4-a29b59ec50d4
* Version Independent ID: 1a8e88ed-72c7-fbe7-b0ad-68f23b3946cd
* Content: [az ad sp](https://learn.microsoft.com/en-us/cli/azure/ad/sp?branch=main&view=azure-cli-latest#az-ad-sp-create-for-rbac)
* Content Source: [latest/docs-ref-autogen/ad/sp.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/main/latest/docs-ref-autogen/ad/sp.yml)
* Service: **active-directory**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**