fixed xml doc

com.unity.perception/Runtime/Randomization/Scenarios/ScenarioBase.cs

 
         /// <summary>
         /// On some platforms, the simulation capture package cannot capture the first frame of output,
-        /// so this is used to track whether the first frame has been skipped yet.
+        /// so this field is used to track whether the first frame has been skipped yet.
         /// </summary>
         protected bool m_SkipFrame = true;