invoices/sqldb: query by ChanID when updating AMP invoice preimage

sqldb/sqlc/queries/amp_invoices.sql

@@ -61,7 +61,7 @@ WHERE (
 
 -- name: UpdateAMPSubInvoiceHTLCPreimage :execresult
 UPDATE amp_sub_invoice_htlcs AS a
-SET preimage = $4
+SET preimage = $5
 WHERE a.invoice_id = $1 AND a.set_id = $2 AND a.htlc_id = (
-    SELECT id FROM invoice_htlcs AS i WHERE i.htlc_id = $3
+    SELECT id FROM invoice_htlcs AS i WHERE i.chan_id = $3 AND i.htlc_id = $4
 );