Update Learning-Environment-Create-New.md (#3356)

* Update Learning-Environment-Create-New.md

In the "Final Editor Setup" , I think their should be a Step to add Decision Parameters Script and it says Decision Period from 1 to 20.
Without this their was no action taken by the RolerAgent. After adding this step it worked for me.

* Update docs/Learning-Environment-Create-New.md

Co-Authored-By: Chris Elion <celion@gmail.com>

* Update docs/Learning-Environment-Create-New.md

Co-Authored-By: Chris Elion <celion@gmail.com>

Co-authored-by: Chris Elion <celion@gmail.com>

docs/Learning-Environment-Create-New.md

 
 1. Select the **RollerAgent** GameObject to show its properties in the Inspector
     window.
-2. Change **Decision Interval** from `1` to `10`.
-3. Drag the Target GameObject from the Hierarchy window to the RollerAgent
+2. Add the Decision Requester script with the Add Component button from the RollerAgent Inspector.
+3. Change **Decision Period** to `10`.
+4. Drag the Target GameObject from the Hierarchy window to the RollerAgent
-4. Add the Behavior Parameters script with the Add Component button from the RollerAgent Inspector.
-5. Modify the Behavior Parameters of the Agent :
+5. Add the Behavior Parameters script with the Add Component button from the RollerAgent Inspector.
+6. Modify the Behavior Parameters of the Agent :
   * `Behavior Name` to *RollerBallBrain*
   * `Vector Observation` `Space Size` = 8
   * `Vector Action` `Space Type` = **Continuous**
 
 * If you are using multiple training areas, make sure all the Agents have the same `Behavior Name`
 and `Behavior Parameters`
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