Update AzureActiveDirectoryRegistration.xml openIdIssuer example URL

[ClassyCircuit]

Using the incorrect token issuer URL: https://login.microsoftonline.com/v2.0/{tenant-guid}/ results in error: 500 Unable to download OpenID Connect Configuration.
The URL parameters should be switched around, like this: https://login.microsoftonline.com/{tenant-guid}/v2.0 then the API call works.

[learn-build-service-prod]

Learn Build status updates of commit 873ba47:

💡 Validation status: suggestions

File	Status	Preview URL	Details
xml/Microsoft.Azure.Management.WebSites.Models/AzureActiveDirectoryRegistration.xml	💡Suggestion	View (azure-dotnet-legacy || azure-dotnet || azure-dotnet-preview)	Details

xml/Microsoft.Azure.Management.WebSites.Models/AzureActiveDirectoryRegistration.xml

• Line 0, Column 0: [Suggestion: link-broken - See documentation] Link 'https://login.microsoftonline.com/{tenant-guid}/v2.0' points to a page that doesn't exist. Check the path or URL and update the link.
• Line 0, Column 0: [Suggestion: link-broken - See documentation] Link 'https://login.microsoftonline.com/{tenant-guid}/v2.0' points to a page that doesn't exist. Check the path or URL and update the link.

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