Update SmtpEmailSender.cs

framework/src/Volo.Abp.Emailing/Volo/Abp/Emailing/Smtp/SmtpEmailSender.cs

@@ -73,7 +73,7 @@ public class SmtpEmailSender : EmailSenderBase, ISmtpEmailSender, ITransientDepe
         using (var smtpClient = await BuildClientAsync())
         {
             Logger.LogWarning("We don't recommend that you use the SmtpClient class for new development because SmtpClient doesn't support many modern protocols. " +
-                               "Use MailKit(https://github.com/jstedfast/MailKit) or other libraries instead." +
+                               "Use MailKit(https://docs.abp.io/en/abp/latest/MailKit) or other libraries instead." +
                                "For more information, see https://github.com/dotnet/platform-compat/blob/master/docs/DE0005.md");
 
             await smtpClient.SendMailAsync(mail);