Change setFramerate to setFrameRate

docs/modules/core/pages/system/appsettings.adoc

@@ -80,7 +80,7 @@ a|Set the color depth. +
 4 bpp = 16 colors, 8 bpp = 256 colors, 24 or 32 bpp = "`truecolor`".
 a|24
 
-a|setFramerate(60)
+a|setFrameRate(60)
 a|How often per second the engine should try to refresh the frame. For the release, usually 60 fps. Can be lower (30) if you need to free up the CPU for other applications. No use setting it to a higher value than the screen frequency! If the framerate goes below 30 fps, viewers start to notice choppiness or flickering.
 a|-1 (unlimited)