A few minor Sona fixes

I noticed that Sona says "Adagio summoner." Usually if a champion is talking a speed, the say a synonym for "fast" not "slow," so I was wondering if you would change it to "Vivace" or "Allegro." Also, instead of saying, "Accelerated movement," she could simply say "Accelerando."

I'd just like if the words she said sounded a bit more musical.