netlink: spelling: fix appened -> appended in a comment

Fix spelling mistake in net/netlink/af_netlink.c
appened -> appended

Signed-off-by: Faisal Bukhari <faisalbukhari523@gmail.com>
Signed-off-by: NipaLocal <nipa@local>

Author: Faisal-523

net/netlink/af_netlink.c

@@ -2472,7 +2472,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err,
 	unsigned int flags = 0;
 	size_t tlvlen;
 
-	/* Error messages get the original request appened, unless the user
+	/* Error messages get the original request appended, unless the user
 	 * requests to cap the error message, and get extra error data if
 	 * requested.
 	 */