Update azure_rm_manageddisk Doc to reflect return value

[nbr23]

SUMMARY

The azure_rm_manageddisk documentation for the module's return value is incorrect. This fixes the documentation to match reality.

ISSUE TYPE

• Docs Pull Request

COMPONENT NAME

• azure_rm_manageddisk

ADDITIONAL INFORMATION

The azure_rm_manageddisk documentation mentions a return dict of this shape:

{
 'id': diskid
 'state': disk_state
 'changed': true
}

However, the 'id' field is not present in the return value and must be fetched from the 'state' field. This PR removes 'id' as a field from the description, and adds a list of the fields present in 'state'.

The tests already reflect this, no update needed.

[xuzhang3]

LGTM