Clarification of the display name meaning

For the create option, the documentation states the following:

--display-name -u
Display name of the Azure AD administrator user or group.

The documentation implies that the create command requires you to know the Azure AD display name, which is not correct. The display name here is the display name you wish to give the user/group when viewing it in the GUI (or using the various command line options). It does not need to match the actual Azure AD user/group display name and can be as simple as "ADMIN". Therefore, I recommend changing the documentation to:

--display-name -u
Display name that you wish to give of the Azure AD administrator user or group in the SQL Server configuration. It does not need to match the actual Azure AD administrator user or group display name.

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#### Document Details

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* ID: 0bca10a0-5310-1ed6-8391-57a8ccafb27f
* Version Independent ID: 4144f2fa-35f1-533c-e48b-17180f03203e
* Content: [az sql server ad-admin](https://docs.microsoft.com/en-us/cli/azure/sql/server/ad-admin?view=azure-cli-latest)
* Content Source: [latest/docs-ref-autogen/sql/server/ad-admin.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/master/latest/docs-ref-autogen/sql/server/ad-admin.yml)
* Service: **sql-database**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**