Fix on_player_swaps_hands firing on stab instead of when it should

src/main/java/carpet/mixins/ServerGamePacketListenerImpl_scarpetEventsMixin.java

@@ -100,7 +100,7 @@ public class ServerGamePacketListenerImpl_scarpetEventsMixin
     @Inject(method = "handlePlayerAction", cancellable = true, at = @At(
             value = "INVOKE",
             target = "Lnet/minecraft/server/level/ServerPlayer;getItemInHand(Lnet/minecraft/world/InteractionHand;)Lnet/minecraft/world/item/ItemStack;",
-            ordinal = 0,
+            ordinal = 1, // not very robust, see spear
             shift = At.Shift.BEFORE
     ))
     private void onHandSwap(ServerboundPlayerActionPacket playerActionC2SPacket_1, CallbackInfo ci)