fixed typo in example
fixed typo in example

fixes #2599

halfzebra/webpack,pugnascotia/webpack,webpack/webpack,nkzawa/webpack,SimenB/webpack,NekR/webpack,halfzebra/webpack,ts-webpack/webpack,rlugojr/webpack,pugnascotia/webpack,cesarandreu/webpack,SimenB/webpack,rlugojr/webpack,jamestautges/webpack,ts-webpack/webpack,jescalan/webpack,g0ddish/webpack,jamestautges/webpack,ts-webpack/webpack,webpack/webpack,g0ddish/webpack,halfzebra/webpack,nkzawa/webpack,NekR/webpack,ts-webpack/webpack,webpack/webpack,g0ddish/webpack,cesarandreu/webpack,nkzawa/webpack,cesarandreu/webpack,jescalan/webpack,jescalan/webpack,SimenB/webpack,webpack/webpack,rlugojr/webpack,sdawson/webpack,pugnascotia/webpack,EliteScientist/webpack,sdawson/webpack,EliteScientist/webpack,SimenB/webpack