Making names consistent

com.unity.perception/Documentation~/SetupSteps.md

-# Installing Perception in your project
+# Installing the Perception package in your project
 You can also set up a new or existing project to use Perception.
 *The following instructions reference the Unity doc's page on [installing a local package](https://docs.unity3d.com/Manual/upm-ui-local.html)*
 

com.unity.perception/Documentation~/index.md

 <img src="images/banner2.PNG" align="middle"/>
 
-# com.unity.perception
+# Unity Perception package (com.unity.perception)
-> Perception is in active development. Its features and API are subject to significant change as development progresses.
+> The Perception package is in active development. Its features and API are subject to significant change as development progresses.
 
 [Installation instructions](SetupSteps.md)