Use ArgumentNullException instead null coalescing

According to the dotnet#50665 I have made a small change. With this change, this method will not use null coalescing operators to fire the ArgumentNullException exception.

It will use ArgumentNullException.ThrowIfNull instead of it.

src/Components/Authorization/src/AuthenticationState.cs

@@ -16,7 +16,8 @@ public class AuthenticationState
     /// <param name="user">A <see cref="ClaimsPrincipal"/> representing the user.</param>
     public AuthenticationState(ClaimsPrincipal user)
     {
-        User = user ?? throw new ArgumentNullException(nameof(user));
+        ArgumentNullException.ThrowIfNull(user);
+        User = user;
     }
 
     /// <summary>