Исправлено предупреждение

src/Sms.Environment.Windows/WindowsEnvironmentVariableStore.cs

@@ -1,8 +1,10 @@
+using System.Runtime.Versioning;
 using Microsoft.Win32;
 using Sms.Environment;
 
 namespace Sms.Environment.Windows;
 
+[SupportedOSPlatform("windows")]
 public sealed class WindowsEnvironmentVariableStore : IEnvironmentVariableStore
 {
     private const string EnvironmentKeyPath = "Environment";