Update remarks for Enviroment.OSVersion (#8996)

Author: jkotas

xml/System/Environment.xml

@@ -1765,7 +1765,9 @@ The following example creates environment variables for the <xref:System.Environ
 
 ## Remarks
 
-In .NET versions prior to .NET 5, <xref:System.Environment.OSVersion?displayProperty=nameWithType> returns an OS version that may be incorrect when an application runs under Windows compatibility mode. For more information, see [GetVersionExA function remarks](/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa#remarks). In .NET 5 and later versions, <xref:System.Environment.OSVersion?displayProperty=nameWithType> always returns the actual OS version. For more information, see [Environment.OSVersion returns the correct operating system version](/dotnet/core/compatibility/core-libraries/5.0/environment-osversion-returns-correct-version).
+<xref:System.Environment.OSVersion?displayProperty=nameWithType> returns an OS version that may be incorrect when an application runs under Windows compatibility mode. For more information, see [GetVersionExA function remarks](/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa#remarks).
+
+In .NET 5 and later versions, <xref:System.Environment.OSVersion?displayProperty=nameWithType> returns the actual OS version in compatibility modes specified by the [application manifest](/windows/win32/sysinfo/targeting-your-application-at-windows-8-1). For more information, see [Environment.OSVersion returns the correct operating system version](/dotnet/core/compatibility/core-libraries/5.0/environment-osversion-returns-correct-version).
 
 To identify the operating system platform, for example, Linux or Windows, you can use the <xref:System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform%2A?displayProperty=nameWithType> method.