WPF - Change CopyMemory PInvoke signature to work with .Net Core

.Net could fails with exception "Unable to find an entry point named 'CopyMemory' in DLL 'kernel32.dll`" as
the export doesn't exist see reference https://github.com/dotnet/coreclr/issues/24008

Issue #2053

Author: amaitland

CefSharp.Wpf/Rendering/AbstractRenderHandler.cs

@@ -20,7 +20,7 @@ namespace CefSharp.Wpf.Rendering
     /// <seealso cref="CefSharp.Wpf.IRenderHandler" />
     public abstract class AbstractRenderHandler : IDisposable, IRenderHandler
     {
-        [DllImport("kernel32.dll", EntryPoint = "CopyMemory", SetLastError = false)]
+        [DllImport("kernel32.dll", EntryPoint = "RtlCopyMemory", SetLastError = false)]
         protected static extern void CopyMemory(IntPtr dest, IntPtr src, uint count);
 
         internal static readonly PixelFormat PixelFormat = PixelFormats.Pbgra32;