fix extensions script name

Author: joaoborks

Packages/com.mygamedevtools.scene-loader/Runtime/SceneDirector.cs

@@ -27,7 +27,7 @@ public class SceneDirector : ISceneDirector
         ISceneData _activeScene;
 
         /// <summary>
-        /// Creates an <see cref="SceneDirector"/> with no initial scene references.
+        /// Creates a <see cref="SceneDirector"/> with no initial scene references.
         /// </summary>
         public SceneDirector() : this(false) { }
         /// <summary>