Fix air drag default value.

Author: D8H

examples/360°-platformer/360°-platformer.json

@@ -1249,7 +1249,7 @@
               "Gravity": 2362.5,
               "MaxFallingSpeed": 1440,
               "CeilBounceFactor": 0,
-              "AirDrag": 0.03125,
+              "AirDrag": 0.000488,
               "AirDragMinSpeedY": -720,
               "AirAcceleration": 1012.5,
               "GroundAcceleration": 506.25,
@@ -31536,7 +31536,7 @@
               "name": "CeilBounceFactor"
             },
             {
-              "value": "0,03125",
+              "value": "0,000488",
               "type": "Number",
               "unit": "Dimensionless",
               "label": "Air drag",