The third-year QB’s first significant playing time came against the Packers as a rookie PHILADELPHIA – Be a thermostat and not a thermometer is a phrase you might hear in a corporate board room or the Eagles’ media house. On Wednesday, you heard the sentiment coming from the starting quarterback of the 9-1 Philadelphia Eagles. “I just try not to ever get too high, never get too low, and that’s in every area of my game,” Jalen Hurts said as the 9-1 Eagles continued preparation for Sunday night’s game against the 4-7 Green Bay Packers. “You talk about the temperature…