A Quick Sound Effect Change (many thanks to Brendan Coffey!)

A quick change to the "rune complete" sound effect. The sound was created by Brendan Coffey, so many thanks to him!

I'm not sure whether or not this change is fair for the jam, so the mac and windows downloadable versions have not been updated (they are as they were when the game was submitted), and only the WebGL version has the new sound effect.