chore(deps): update actions/upload-artifact action to v6 (#163)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/testing.yml

@@ -47,7 +47,7 @@ jobs:
 
       - name: Run coverage report
         run: yarn coverage
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: coverage-data-${{ github.run_id }}
           path: |