Revert engine version to 4.5 for demos with upgraded TileMapLayer

The demos still work on 4.5.1.stable, so there's no need to increase
the project version.

2d/hexagonal_map/project.godot

@@ -14,7 +14,7 @@ config/name="Hexagonal Game"
 config/description="Very simple demo showing a hexagonal TileMap and TileSet."
 config/tags=PackedStringArray("2d", "demo", "official", "tilemap")
 run/main_scene="res://map.tscn"
-config/features=PackedStringArray("4.6")
+config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
 [debug]

2d/kinematic_character/project.godot

@@ -16,7 +16,7 @@ CharacterBody2D. The character moves around, is affected by moving
 platforms, can jump through one-way collision platforms, etc."
 config/tags=PackedStringArray("2d", "demo", "official", "physics")
 run/main_scene="res://world.tscn"
-config/features=PackedStringArray("4.6")
+config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
 [debug]

2d/physics_platformer/project.godot

@@ -17,7 +17,7 @@ but can be more difficult to handle, as they require
 manual modification of the RigidBody3D velocity."
 config/tags=PackedStringArray("2d", "demo", "official", "physics", "tilemap")
 run/main_scene="res://stage.tscn"
-config/features=PackedStringArray("4.6")
+config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
 [debug]

2d/physics_tests/project.godot

@@ -13,7 +13,7 @@ config_version=5
 config/name="2D Physics Tests"
 config/tags=PackedStringArray("2d", "demo", "official", "physics")
 run/main_scene="res://main.tscn"
-config/features=PackedStringArray("4.6")
+config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
 [autoload]

2d/skeleton/project.godot

@@ -16,7 +16,7 @@ Godot's Skeleton2D node. There are several movement-related animations and
 there is a simple character controller that controls the animations."
 config/tags=PackedStringArray("2d", "animation", "demo", "official", "rendering")
 run/main_scene="res://level.tscn"
-config/features=PackedStringArray("4.6")
+config/features=PackedStringArray("4.5")
 config/icon="res://icon.webp"
 
 [debug]