Update SetupSteps.md

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

 
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-1. Install the latest [2019.3 Unity Editor](https://unity.com/releases/2019-4) 
-1. Create a new HDRP or URP project, or open an existing project
+This page provides brief instructions on installing the Perception package. Head over to the [Perception Tutorial](Tutorial/TUTORIAL.md) for more detailed instructions and steps for building a sample project.
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+1. Install the latest version of 2020.1.x Unity Editor from [here](https://unity3d.com/get-unity/download/archive). (Perception has not been tested on Unity versions newer than 2020.1)
+1. Create a new HDRP or URP project, or open an existing project.
+
+Note that although the Perception package is compatible with both URP and HDRP, Unity Simulation currently only supports URP projects, therefore a URP project is recommended. 
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-Once completed you can continue with the [getting started steps](GettingStarted.md).