According to the provided changelog, the update pushes the device up to software version 1.32.502.31. The page lists both camera and thermal improvements, in addition to general bugfixes.
The full RUU is also available at the bottom of the page, if you want or need to flash the update manually instead.
AT&T HTC One M9 Gets Camera-Improving OTA Update, RUU Also Available was written by the awesome team at Android Police.
from Android Police – Android News, Apps, Games, Phones, Tablets http://ift.tt/1aPA7fm