Fix mode 4 description in graphics.md

gbadev-org / gbadoc

Community initiated GBA Technical documentation effort

http://gbadev-org.github.io/gbadoc/

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Fix mode 4 description in graphics.md #22

Closed Kyrio closed 5 months ago

Kyrio commented 5 months ago

The mode 4 description mentioned the wrong bit for page flipping (bit 3 of DISPCNT instead of 4). This also fixes the link to color formats in the same paragraph.