update codecov CI to latest version

.github/workflows/coverage.yml

@@ -14,8 +14,8 @@ jobs:
       - name: Run Coverage
         run: ./ci.sh coverage
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v5
         with:
-          #token: ${{ secrets.CODECOV_TOKEN }} # not required for public repos
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: lcov.info
           fail_ci_if_error: false