Upgrade Codecov action to version 5

Updated Codecov action version from v4 to v5.

Author: mvogttech

.github/workflows/test.yml

@@ -36,8 +36,9 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: matrix.os == 'ubuntu-latest' && matrix.node-version == '20.x'
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: ./coverage/lcov.info
           flags: unittests
           name: codecov-umbrella