fix multitile mapper example location

Author: AlexeyBond

addons/wfc/examples/helpers/demo_wfc_2d_tilemap_multitile.tscn renamed to addons/wfc/examples/demo_wfc_2d_tilemap_multitile.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=13 format=3 uid="uid://do26y4bs02o2g"]
+[gd_scene load_steps=14 format=3 uid="uid://do26y4bs02o2g"]
 
 [ext_resource type="TileSet" uid="uid://dgefkshuslimj" path="res://addons/wfc/examples/assets/kenney-tiny-dungeon/tile-set.tres" id="1_kld1t"]
 [ext_resource type="Script" path="res://addons/wfc/nodes/generator_2d.gd" id="2_lei82"]
 [ext_resource type="Script" path="res://addons/wfc/problems/2d/mappers/mapper_2d_layered_tilemap.gd" id="3_x6bkc"]
+[ext_resource type="Script" path="res://addons/wfc/utils/bitmatrix.gd" id="3_xkmgf"]
 [ext_resource type="Script" path="res://addons/wfc/problems/2d/mappers/mapper_2d_multitile.gd" id="4_81wi2"]
 [ext_resource type="Script" path="res://addons/wfc/problems/2d/rules_2d.gd" id="5_5pb0u"]
 [ext_resource type="Script" path="res://addons/wfc/solver/solver_settings.gd" id="6_7k31g"]
@@ -38,7 +39,7 @@ script = ExtResource("5_5pb0u")
 mapper = SubResource("Resource_rfxqi")
 complete_matrices = true
 axes = Array[Vector2i]([Vector2i(0, 1), Vector2i(1, 0)])
-axis_matrices = Array[Resource("res://addons/wfc/utils/bitmatrix.gd")]([])
+axis_matrices = Array[ExtResource("3_xkmgf")]([])
 probabilities = []
 probabilities_enabled = true
 edge_condition_meta_name = "wfc_edge"