ksmbd: Fix spelling mistake "connction" -> "connection"

[ Upstream commit e758fa69

 ]

There is a spelling mistake in a ksmbd_debug debug message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>