Change Accuracy challenge mod icon

[JanGolicnik]

I couldn't really track down why the value 88 was chosen for the icon as the default accuracy threshold value is 90% and the icon should reflect that.

88 is also a known nazi dogwhistle and hate symbol.

[SupDos]

It's a segmented display with all segments lit up, the default skin which has numbers that look sort of similar to a segmented display as well with the wireframe design it has going on, not whatever you're accusing it of being.

[JanGolicnik]

My mad I didn't recognize it as a display, and I apologize for the misunderstanding.

I'd still note the design is rather awkward as it never occured to me to be anything other than a percentage value, especially considering accuracy being a percentage and all. When first using the mod I thought the fail threshold was 88%.