multi: fix newly detected linter issues

htlcswitch/switch.go

@@ -1130,7 +1130,7 @@ func (s *Switch) handlePacketForward(packet *htlcPacket) error {
 		// this htlc. The reason for randomization is to evenly
 		// distribute the htlc load without making assumptions about
 		// what the best channel is.
-		destination := destinations[rand.Intn(len(destinations))]
+		destination := destinations[rand.Intn(len(destinations))] // nolint:gosec
 
 		// Retrieve the incoming link by its ShortChannelID. Note that
 		// the incomingChanID is never set to hop.Source here.

htlcswitch/switch_test.go

@@ -2909,7 +2909,7 @@ func testHtcNotifier(t *testing.T, testOpts []serverOption, iterations int,
 
 	// Add the htlcNotifier option to any other options
 	// set in the test.
-	options := append(testOpts, notifierOption)
+	options := append(testOpts, notifierOption) // nolint:gocritic
 
 	n := newThreeHopNetwork(
 		t, channels.aliceToBob,