fix(deps): bump lodash-es and langium in /slides

Bumps [lodash-es](https://github.com/lodash/lodash) and [langium](https://github.com/eclipse-langium/langium/tree/HEAD/packages/langium). These dependencies needed to be updated together.

Updates `lodash-es` from 4.17.23 to 4.18.1
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.23...4.18.1)

Updates `langium` from 4.2.1 to 4.2.2
- [Release notes](https://github.com/eclipse-langium/langium/releases)
- [Changelog](https://github.com/eclipse-langium/langium/blob/main/packages/langium/CHANGELOG.md)
- [Commits](https://github.com/eclipse-langium/langium/commits/HEAD/packages/langium)

---
updated-dependencies:
- dependency-name: lodash-es
  dependency-version: 4.18.1
  dependency-type: indirect
- dependency-name: langium
  dependency-version: 4.2.2
  dependency-type: indirect
...

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Author: dependabot[bot]