[3D platformer] Fix required behavior of Physics3D (#883)

- Don't show in changelog

Author: D8H

examples/3d-platformer/3d-platformer.json

@@ -1724,7 +1724,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Kinematic",
               "bullet": false,
               "fixedRotation": true,
@@ -1979,7 +1979,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Static",
               "bullet": false,
               "fixedRotation": false,
@@ -2089,7 +2089,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Dynamic",
               "bullet": false,
               "fixedRotation": false,
@@ -2310,7 +2310,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Static",
               "bullet": false,
               "fixedRotation": false,
@@ -2435,7 +2435,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Static",
               "bullet": false,
               "fixedRotation": false,
@@ -2473,7 +2473,7 @@
             {
               "name": "Physics3D",
               "type": "Physics3D::Physics3DBehavior",
-              "Object3D": "Object3D",
+              "object3D": "Object3D",
               "bodyType": "Dynamic",
               "bullet": false,
               "fixedRotation": false,