Update zig/comptimeFont.zig

zig/comptimeFont.zig

@@ -2,6 +2,7 @@
 const std = @import("std");
 const readInt = std.mem.readInt;
 const assert = std.debug.assert;
+// this expects a TrueType font with an interface like https://codeberg.org/andrewrk/TrueType/
 const font = @import("main.zig").defaultFont;
 
 fn sort(array: []const u16) []const u16 {