Bumps the github-actions group with 2 updates in the / directory: [actions/upload-artifact](https://github.com/actions/upload-artifact) and [lkstrp/pypsa-validator](https://github.com/lkstrp/pypsa-validator).


Updates `actions/upload-artifact` from 3.2.1.pre.node20 to 4.4.3
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3.2.1-node20...v4.4.3)

Updates `lkstrp/pypsa-validator` from 0.2.2 to 0.2.3
- [Release notes](https://github.com/lkstrp/pypsa-validator/releases)
- [Commits](lkstrp/pypsa-validator@v0.2.2...v0.2.3)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: lkstrp/pypsa-validator
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>

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