update signal name

getting_started/first_2d_game/05.the_main_game_scene.rst

@@ -289,7 +289,7 @@ the other two timers. ``ScoreTimer`` will increment the score by 1.
         godot::register_property("mob_scene", &Main::mob_scene, (godot::Ref<godot::PackedScene>)nullptr);
     }
 
-In ``_on_MobTimer_timeout()``, we will create a mob instance, pick a random
+In ``_on_mob_timer_timeout()``, we will create a mob instance, pick a random
 starting location along the ``Path2D``, and set the mob in motion. The
 ``PathFollow2D`` node will automatically rotate as it follows the path, so we
 will use that to select the mob's direction as well as its position.

getting_started/first_2d_game/06.heads_up_display.rst

@@ -391,7 +391,7 @@ In ``game_over()`` we need to call the corresponding ``HUD`` function:
 Just a reminder: we don't want to start the new game automatically, so
 remove the call to ``new_game()`` in ``_ready()`` if you haven't yet.
 
-Finally, add this to ``_on_ScoreTimer_timeout()`` to keep the display in sync
+Finally, add this to ``_on_score_timer_timeout()`` to keep the display in sync
 with the changing score:
 
 .. tabs::