[Experimental] [Height map] Fix physics not enabling when an image is used (#1907)

Author: D8H

extensions/community/HeightMap3D.json

@@ -9,7 +9,7 @@
   "name": "HeightMap3D",
   "previewIconUrl": "https://asset-resources.gdevelop.io/public-resources/Icons/10e0a26c0d500830dfe23b94138beb0ef61607ba62bca05a5aa5c849777f1b06_terrain.svg",
   "shortDescription": "A terrain with hills where 3D physics objects can stand.",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": [
     "A terrain with hills where objects with the 3D physics behavior can stand.",
     "",
@@ -263,7 +263,8 @@
             "",
             "        this.physicsBodyUpdater = physics.bodyUpdater;",
             "        physics.bodyUpdater = this;",
-            "        physics.recreateBody();",
+            "        // Calling `recreateBody` directly doesn't work.",
+            "        this.heightMap.hasChangedThisFrame = true;",
             "    }",
             "",
             "    updateIfNeeded() {",