Cannot support hyphen in language identifier of code block

[dingmeng-xue]

Steps to reproduce

Given there is one existing PowerShell help markdown including below example. Please note its language identifier is azurepowershell-interactive

```azurepowershell-interactive
$rgName = "resourceGroupName"
$vnet = Get-AzVirtualNetwork -ResourceGroupName $rgName -Name "vnet"
$pip = Get-AzPublicIpAddress -ResourceGroupName $rgName -Name "publicIpName"
New-AzFirewall -Name "azFw" -ResourceGroupName $rgName -Location centralus -VirtualNetwork $vnet -PublicIpAddress $pip
```

When developer update doc again via Update-MarkdownHelp, it becomes into

```azurepowershell
-interactive
$rgName = "resourceGroupName"
$vnet = Get-AzVirtualNetwork -ResourceGroupName $rgName -Name "vnet"
$pip = Get-AzPublicIpAddress -ResourceGroupName $rgName -Name "publicIpName"
New-AzFirewall -Name "azFw" -ResourceGroupName $rgName -Location centralus -VirtualNetwork $vnet -PublicIpAddress $pip
```

You can see language identifier of code block doesn't support hyphen well. The text after hyphen is moved to the new line. We raise question because online doc will support more language identifiers https://review.docs.microsoft.com/en-us/help/contribute/code-in-docs?branch=master#inline-interactive-code-blocks

Expected behavior

```azurepowershell-interactive
$rgName = "resourceGroupName"
$vnet = Get-AzVirtualNetwork -ResourceGroupName $rgName -Name "vnet"
$pip = Get-AzPublicIpAddress -ResourceGroupName $rgName -Name "publicIpName"
New-AzFirewall -Name "azFw" -ResourceGroupName $rgName -Location centralus -VirtualNetwork $vnet -PublicIpAddress $pip
```

Actual behavior

Environment data

Script 0.14.2 platyPS

PS C:\Dev> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.2.0-preview.6
PSEdition                      Core
GitCommitId                    7.2.0-preview.6
OS                             Microsoft Windows 10.0.22000
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[sdwheeler]

I think this may be fixed already in Microsoft.PowerShell.PlatyPS v1. Need to retest in Update scenario.