build.sh error

https://github.com/juancastillo0/wasm_run/blob/0cedc87f82e2905235763c3bcbcb636ed1ca1a4c/packages/dart_wit_component/wasm_wit_component/build.sh#L15

There is bug&#65306;```lib/src/generator.dart``` is an existing file on which the generated dart file depends. There should be the name of the generated dart file, (the second input parameter of bin/generate.dart).