Update another doc page

This was missed before.

Author: odersky

docs/docs/reference/metaprogramming/erased-terms.md

@@ -171,11 +171,11 @@ final class On extends State
 final class Off extends State
 
 class Machine[S <: State] {
-  inline def turnOn() <: Machine[On] = inline erasedValue[S] match {
+  transparent inline def turnOn(): Machine[On] = inline erasedValue[S] match {
     case _: Off  => new Machine[On]
     case _: On   => error("Turning on an already turned on machine")
   }
-  inline def turnOff() <: Machine[Off] = inline erasedValue[S] match {
+  transparent inline def turnOff(): Machine[Off] = inline erasedValue[S] match {
     case _: On  => new Machine[Off]
     case _: Off   => error("Turning off an already turned off machine")
   }