As per QRH, we are allowed to increase up to 15kt above VLS. It’s really up to you.
Everytime I increase the VAPP, I insert it in the Flightsmart landing data to have an accurate landing distance. Unless I operate on short runways ( which we don’t; the shortest one is about 2500 meters), I rather approach slightly too fast than too slow and ending on the backside of the power curve. My worst landings were most of the time due to lack of energy.