Correction of `Jx` and `-Jxx` fonts on Effect Command reference card (not to be confused with lx and Ix)

The font of -Jxx and -Jx commands in the following Effect Command reference card is confusing with lower case “L” and upper case “i”. I think it would be better to fix that.

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https://tutorials.renoise.com/wiki/Effect_Commands

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Apart from that, I was very happy to see that Renoise has this Effect Command reference card. Thank you!