ksmbd: shorten experimental warning on loading the module

ksmbd is continuing to improve.  Shorten the warning message
logged the first time it is loaded to:
   "The ksmbd server is experimental"

Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/ksmbd/server.c

@@ -585,7 +585,7 @@ static int __init ksmbd_server_init(void)
 	if (ret)
 		goto err_crypto_destroy;
 
-	pr_warn_once("The ksmbd server is experimental, use at your own risk.\n");
+	pr_warn_once("The ksmbd server is experimental\n");
 
 	return 0;