SAO PAULO — With “I believe that we will win!” American soccer fans finally have a World Cup chant that doesn’t just involve shouting their country’s name. In terms of creativity, though, it’s a notch below Argentina’s elaborate sing-alongs or even the boisterous chants of the English. All players can testify to the goose bump-inducing effect of thousands of fans joining together for a synchronized chant. While most fans simply spell out the name of their country, from …