Update TUTORIAL.md

TUTORIAL.md

 <img src="com.unity.perception/Documentation~/images/unity-wide.png" align="middle" width="3000"/>
 
-#Perception Tutorial
+# Perception Tutorial
-## Phase 1: Setup and Basic Simulation
+## Phase 1: Setup and Basic Simulations
 
 This phase will cover essential tasks and skills such as:
  * Downloading Unity Editor and the Perception package