Fix reverb predelay feedback for platformer 3d

3d/platformer/default_bus_layout.tres

@@ -4,7 +4,7 @@
 
 resource_name = "Reverb"
 predelay_msec = 150.0
-predelay_feedback = 150.0
+predelay_feedback = 0.8
 room_size = 0.33
 damping = 0.32
 spread = 1.0
@@ -21,7 +21,7 @@ volume_db = 0.0
 
 resource_name = "Reverb"
 predelay_msec = 150.0
-predelay_feedback = 150.0
+predelay_feedback = 0.8
 room_size = 0.89
 damping = 0.17
 spread = 1.0