R&Y: Changed references of `Itso` to `ITSO`

Stylisation updates.

scenes/metroflip_scene_config.h

@@ -9,6 +9,6 @@ ADD_SCENE(metroflip, bip, Bip)
 ADD_SCENE(metroflip, myki, myki)
 ADD_SCENE(metroflip, troika, Troika)
 ADD_SCENE(metroflip, opal, Opal)
-ADD_SCENE(metroflip, itso, Itso)
+ADD_SCENE(metroflip, itso, ITSO)
 ADD_SCENE(metroflip, about, About)
 ADD_SCENE(metroflip, credits, Credits)