Update ShadowTheHedgehog config - GUP.ini

[dreamsyntax]

As of 5.0-3251, only EFBToTextureEnable should be True, not False.
It used to be set to False to fix 2P splitscreen not rendering- this is not the case in 5.0-3251+
Setting to True causes large performance increase for this game.

[JosJuice]

Instead of setting it to True, please remove the line. We don't want to force inaccurate settings for anyone who manually has selected the more accurate setting in the global config.

[JMC47]

I wasn't aware this was fixed, I'll verify it real quick.

[dreamsyntax]

I can't seem to update the wiki for the game to reflect this change, is there a process to get added to the approved wiki editors?

[JMC47]

@dolphin-emu-bot rebuild

Looks good to me.

[JosJuice]

For now, you have to make a request in this topic in order to get edit rights on the wiki: https://forums.dolphin-emu.org/Thread-editing-dolphin-s-wiki

Please squash the two commits into one, then we can merge this PR.