Update Learning-Environment-Create-New.md (#770)

Shouldn't Done(); be placed after the rewards are given?

docs/Learning-Environment-Create-New.md

 // Reached target
 if (distanceToTarget < 1.42f)
 {
-    Done();
+    Done();
 }
 ```
 
 // Fell off platform
 if (this.transform.position.y < -1.0)
 {
-    Done();
+    Done();
 }
 ```
 
     // Reached target
     if (distanceToTarget < 1.42f)
     {
-        Done();
+        Done();
     }
     
     // Getting closer
     // Fell off platform
     if (this.transform.position.y < -1.0)
     {
-        Done();
+        Done();
     }
     previousDistance = distanceToTarget;