Update logo of enterprise applications using the CLI

**Is your feature request related to a problem? Please describe.**
Update logo of enterprise application.

**Describe the solution you'd like**
Being able to update the enterprise application logo using Azure CLI

**Additional context**
Using [`az ad sp update`](https://docs.microsoft.com/en-us/cli/azure/ad/sp?view=azure-cli-latest#az_ad_sp_update), it looks like you can update settings on the "Properties" tab of an Enterprise application ("Enabled for users to sign-in?", "User assignment required?", "Visible to users?"...) except logo. Could it be possible to also update logo using the CLI? E.g. as path to logo `.png` or input base64-encoded image.