chore(deps): bump actions/upload-artifact from 4 to 7 (#218)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: David KRK <136035295+DavidKRK@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/lighthouse.yml

@@ -49,7 +49,7 @@ jobs:
       # Sauvegarder les résultats JSON pour analyse ou tableau de bord
       - name: Sauvegarder les résultats en artefact
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: lighthouse-results-${{ github.run_id }}
           path: '.lighthouseci/'

.github/workflows/maintenance.yml

@@ -94,7 +94,7 @@ jobs:
       # Sauvegarder le rapport complet en artefact
       - name: Sauvegarder le rapport Lychee
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: lychee-report-${{ github.run_id }}
           path: lychee/