cd packages/ckeditor5-build-balloon-block
yarn buildThis will trigger a change in the build directory.
Then go to packages/ckeditor5-build-balloon-block/build and copy ckeditor.js and ckeditor.js.map to libraries/ckeditor in the Notes repository.
Commit the change on both sides.
Then run the server and check type CKEDITOR_VERSION in the browser/Electron console to ensure that the correct version is used. Do a basic sanity check as well.