swipl.js is incorrectly copied from swipl-web.js in docker

See https://github.com/rla/npm-swipl-wasm/blob/eeed9a7124a87e56b2af43d86b4ec5744821594c/package.json#L38

which should be

```
 "build:wasm-docker:extract:node": "docker cp swipl-wasm:/swipl-devel/build.wasm/src/swipl.js dist/swipl/swipl.js", 
```