R&Y: Changed references of `Myki` to `myki`

Stylisation update.

scenes/metroflip_scene_config.h

@@ -6,7 +6,7 @@ ADD_SCENE(metroflip, clipper, Clipper)
 ADD_SCENE(metroflip, metromoney, Metromoney)
 ADD_SCENE(metroflip, read_success, ReadSuccess)
 ADD_SCENE(metroflip, bip, Bip)
-ADD_SCENE(metroflip, myki, Myki)
+ADD_SCENE(metroflip, myki, myki)
 ADD_SCENE(metroflip, troika, Troika)
 ADD_SCENE(metroflip, opal, Opal)
 ADD_SCENE(metroflip, itso, Itso)