Update Training-Configuration-File.md (Unity-Technologies#59)

* Update Training-Configuration-File.md

Doc says "behavior_cloning" when it should say "behavioral_cloning".

* Update Learning-Environment-Design-Agents.md

Minor correction to wording.  (Unity-Technologies#5745)

Author: jrupert-unity

docs/Learning-Environment-Design-Agents.md

@@ -454,7 +454,7 @@ Agent.
 
 - To collect visual observations, attach `CameraSensor` or `RenderTextureSensor`
   components to the agent GameObject.
-- Visual observations should generally be used unless vector observations are
+- Visual observations should generally only be used when vector observations are
   not sufficient.
 - Image size should be kept as small as possible, without the loss of needed
   details for decision making.

docs/Training-Configuration-File.md

@@ -146,7 +146,7 @@ To enable RND, provide these settings:
 
 To enable Behavioral Cloning as a pre-training option (assuming you have
 recorded demonstrations), provide the following configurations under the
-`behavior_cloning` section:
+`behavioral_cloning` section:
 
 | **Setting**          | **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 | :------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |