Rename parameter -> goal

Project/Assets/ML-Agents/Examples/SharedAssets/Scripts/GoalSensorComponent.cs

         return new[] { observationSize };
     }
 
-    public void AddParameterizaton(float parameter)
+    public void AddGoal(float goal)
-            goalSensor.AddObservation(parameter);
+            goalSensor.AddObservation(goal);
         }
     }
 }