net: ipv4: fix typo in comments

The word "advertize" should be replaced by "advertise".
Signed-off-by: Deming Wang <wangdeming@inspur.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/esp4.c

@@ -786,7 +786,7 @@ int esp_input_done2(struct sk_buff *skb, int err)
 
 		/*
 		 * 1) if the NAT-T peer's IP or port changed then
-		 *    advertize the change to the keying daemon.
+		 *    advertise the change to the keying daemon.
 		 *    This is an inbound SA, so just compare
 		 *    SRC ports.
 		 */