Update dragexit data to match ondragexit data (#6995)
Update dragexit data to match ondragexit data (#6995)

This change updates the incomplete version info we had in the support data
for the dragexit event; the change just copies over the more-complete
version info from the support data for the ondragexit event handler.

Relates to https://github.com/mdn/browser-compat-data/issues/6826
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data