Updated the non wokring demo.yubico.com example (#123)

Docs/Examples/Enroll YubiKey FIDO2 against demo.yubico.com.md

@@ -1,34 +1,39 @@
-## UNDER CONSTRUCTION ##
-# Lets start by creating the information prior to creation.
+# UNDER CONSTRUCTION #
+
+### Lets start by creating the information prior to creation.
+```pwsh
 $username = "powershellYK$($(new-guid).tostring().Replace('-',''))"
 $password = (get-date -Format 'yyyy-MM-dd')
 $site = "demo.yubico.com"
+```
 
-# Now that we have a user and password, lets create the user in the Yubico playground
+### Create the user in the Yubico playground
+```pwsh
 $createUser = @{
 'displayName'='powershellYK Demo';
 'namespace'='playground';
 'username'=$username;
 'password'=$password
 } | ConvertTo-JSON
-
 $userCreation = Invoke-RestMethod -Method Post -SessionVariable session -Uri "https://$site/api/v1/user" -Body $createUser -ContentType 'application/json'
+```
 
-#Lets begin registering the YubiKey
+### Lets begin registering the YubiKey
+```pwsh
 $registerBeginBody = @{'authenticatorAttachment' = 'cross-platform'; 'residentKey' = $true} | ConvertTo-JSON
 $registerBeginReturn = Invoke-RestMethod -Method Post -WebSession $session -Uri "https://$site/api/v1/user/$($userCreation.data.uuid)/webauthn/register-begin" -Body $registerBeginBody -ContentType 'application/json'
 
 $userEntity = [Yubico.YubiKey.Fido2.UserEntity]::new([system.convert]::FromBase64String($registerBeginReturn.data.publicKey.user.id.'$base64'))
 $userEntity.Name = $registerBeginReturn.data.publicKey.user.name
 $userentity.DisplayName = $registerBeginReturn.data.publicKey.user.displayname
-
-
 $out = New-YubiKeyFIDO2Credential -RelyingPartyID $registerBeginReturn.data.publicKey.rp.id -RelyingPartyName $registerBeginReturn.data.publicKey.rp.name -Discoverable $true  -Challange $registerBeginReturn.data.publicKey.challenge.'$base64' -UserEntity $userEntity
+```
 
-# This Data is lost by the SDK so we need to build it backup. Wonder if this is where it breaks.
+### Return the attestion data etc to the site
+This Data is lost by the SDK so we need to build it backup. Wonder if this is where it breaks.
+```pwsh
 $a = [powershellYK.FIDO2.CredentialData]::new($out)
 #[system.convert]::ToBase64String($a.w3cEncoded())
-
 $clientDataJSON = @{
     'type' = 'webauthn.create';
     'challenge' = $registerBeginReturn.data.publicKey.challenge.'$base64' -replace '\+', '-' -replace '/', '_' -replace '=','';
@@ -45,3 +50,7 @@ $registerFinishBody = @{
     }
 } | ConvertTo-JSON -Compress
 $registerFinishReturn = Invoke-RestMethod -Method Post -WebSession $session -Uri "https://$site/api/v1/user/$($userCreation.data.uuid)/webauthn/register-finish" -Body $registerFinishBody -ContentType 'application/json'
+```
+
+Here we should be done, but something is broken somewhere..
+