chore(deps): update actions/upload-artifact action to v4 (#38)

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

Author: renovate[bot]

.github/workflows/main.yml

@@ -58,7 +58,7 @@ jobs:
       - name: Run tests
         run: make coverage
       - name: Archive code coverage results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: code-coverage-report
           path: docs/coverage