The answer is true within limits.
Photosynthesis occurs in the leaves of green plants. During photosynthesis, carbon dioxide and water are converted into using the energy of sunlight glucose and oxygen. Thus, the limiting factors for photosynthesis are carbon dioxide, light intensity, and temperature.
Temperature affects an activity of some enzymes characteristic for light independent reactions. It actually doubles the enzyme rate for every 10°C. So, if temperature increases, the rate of these enzymes will increase, as well as the photosynthesis rate. But, this is limited. After reaching optimum temperature, the photosynthesis rate will decrease because the enzymes will denature.