WoW is a CPU heavy game and the load can vary wildly if you’re out in an empty zone or in a city hub with dozens of people around. Also, your laptop might do a zero-fan mode where it only kicks the fan on once the temp gets up to a certain range. So if there was a sudden heavy load for 5-10 seconds, the temp might rocket up that high before the fan kicks on.
Try capping your frame rate to something lower than your refresh rate or turn on vsync. If a CPU heavy game is trying to run at like 500fps, it’s going to heat that CPU up a lot. (WoW isn’t that CPU heavy, but it is still pretty heavy on roughly 4-6 threads worth of load)