Bump the javascript-dependencies group across 1 directory with 2 updates

Bumps the javascript-dependencies group with 2 updates in the /js directory: [@lumino/widgets](https://github.com/jupyterlab/lumino) and [@jupyter/builder](https://github.com/jupyterlab/jupyter-builder).


Updates `@lumino/widgets` from 2.9.0 to 2.10.0
- [Release notes](https://github.com/jupyterlab/lumino/releases)
- [Changelog](https://github.com/jupyterlab/lumino/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/lumino/compare/@lumino/widgets@2.9.0...@lumino/widgets@2.10.0)

Updates `@jupyter/builder` from 1.2.3 to 1.2.4
- [Release notes](https://github.com/jupyterlab/jupyter-builder/releases)
- [Changelog](https://github.com/jupyterlab/jupyter-builder/blob/main/CHANGELOG.md)
- [Commits](jupyterlab/jupyter-builder@v1.2.3...v1.2.4)

---
updated-dependencies:
- dependency-name: "@lumino/widgets"
  dependency-version: 2.10.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: javascript-dependencies
- dependency-name: "@jupyter/builder"
  dependency-version: 1.2.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: javascript-dependencies
...

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Author: dependabot[bot]