[bug] parameter description is incomplete if this parameter is optional and mandatory in different parameter set

Taking parameter VaultName in Get-AzKeyVault for correct instance.
**[[-VaultName] ]**
[[-ResourceGroupName] ]
[-Tag ]
[-DefaultProfile ]
[-SubscriptionId ]
[]

Get-AzKeyVault
**[-VaultName] **
[-Location]
[-InRemovedState]
[-DefaultProfile ]
[-SubscriptionId ]
[]

### -VaultName
Specifies the name of the key vault.

```yaml
Type: System.String
Parameter Sets: GetVaultByName
Aliases: Name

Required: False
Position: 0
Default value: None
Accept pipeline input: True (ByPropertyName)
Accept wildcard characters: True
```

```yaml
Type: System.String
Parameter Sets: ByDeletedVault
Aliases: Name

Required: True
Position: 0
Default value: None
Accept pipeline input: True (ByPropertyName)
Accept wildcard characters: True
```

authorest.powershell makes parameter as True in all parameter sets.