Update example import path in light.md

[urlDev]

This pull request updates the example import in docs/light.md to be compatible with exports in package.json.

[kefniark]

Thanks but no I confirm that the doc is right, it should be

import { detect } from 'tinyld' // use the default
import { detect } from 'tinyld/light'  // use the light version
import { detect } from 'tinyld/heavy' // use the heavy version

You shouldn't need to guess the structure of the dist folder. And using absolute file access can cause typing issues.