Inconsistent name or operation for shoot_multiplier in football

Hi!

While skimming the code I saw this line. Is the multiplier supposed to be added or should it actually be a multiplication? 

https://github.com/proroklab/VectorizedMultiAgentSimulator/blob/4a5b53e7cbca0295e9ff6c7057ed1089b829ea4e/vmas/scenarios/football.py#L1094

Cheers
Max