Bump jupyterlite-core from 0.4.2 to 0.4.3 in the actions group (#45)

Bumps the actions group with 1 update: [jupyterlite-core](https://github.com/jupyterlite/jupyterlite).


Updates `jupyterlite-core` from 0.4.2 to 0.4.3
- [Release notes](https://github.com/jupyterlite/jupyterlite/releases)
- [Changelog](https://github.com/jupyterlite/jupyterlite/blob/main/CHANGELOG.md)
- [Commits](jupyterlite/jupyterlite@v0.4.2...v0.4.3)

---
updated-dependencies:
- dependency-name: jupyterlite-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demo/requirements.txt

@@ -1,5 +1,5 @@
 # Core modules (mandatory)
-jupyterlite-core==0.4.2
+jupyterlite-core==0.4.3
 jupyterlab~=4.2.5
 notebook~=7.2.2