"Pepto" colour palette incorrect

[vonmillhausen]

In /Src/Display.cpp lines 97 to 110, the "Pepto" colour palette is defined; however, there are two problems with it:

1. The "Pepto" colour palette has long since been succeeded by the more accurate "Colodore" palette, also by Philip "Pepto" Timmermann
2. The colours defined in the Frodo source code don't match either of the "Pepto" or "Colodore" palettes, and are just plain wrong

I suggest the code be updated to the below, which will change it to the current community-accepted Colodore palette instead (and update the comment to make it clear that the palette being used is "Colodore" and not "Pepto", both of which are discussed on the linked page):

// C64 "Colodore" color palette
// Values based on measurements by Philip "Pepto" Timmermann <pepto@pepto.de>
// (see https://www.pepto.de/projects/colorvic/)
const uint8 palette_red[16] = {
	0x00, 0xff, 0x81, 0x75, 0x8e, 0x56, 0x2e, 0xed, 0x8e, 0x55, 0xc4, 0x4a, 0x7b, 0xa9, 0x70, 0xb2
};

const uint8 palette_green[16] = {
	0x00, 0xff, 0x33, 0xce, 0x3c, 0xac, 0x2c, 0xf1, 0x50, 0x38, 0x6c, 0x4a, 0x7b, 0xff, 0x6d, 0xb2
};

const uint8 palette_blue[16] = {
	0x00, 0xff, 0x38, 0xc8, 0x97, 0x4d, 0x9b, 0x71, 0x29, 0x00, 0x71, 0x4a, 0x7b, 0x9f, 0xeb, 0xb2
};

I would also further suggest updating lines 37 to 39 in the same file to the following, just for consistency:

#define USE_COLODORE_COLORS 1

#ifdef USE_COLODORE_COLORS