Fix for manifest.json file with images & fonts

Hi Webpackers!

This release fixes a problem the "keys" inside manifest.json for some images and fonts - see #907. This was fixed in #921.

If you continue to have any issues with your manifest.json file, please open an issue. We use a 3rd party library - webpack-manifest-plugin - and we've been working with them to smooth out their Webpack 5 compatibility.

To upgrade:

yarn upgrade "@symfony/webpack-encore@^1.0.6"

Changes: https://github.com/symfony/webpack-encore/compare/v1.0.5..v1.0.6

Documentation: http://symfony.com/doc/current/frontend.html

Happy packing!