Use Codecov token

Author: dmitry-ivanov

.github/workflows/tests.yml

@@ -43,5 +43,6 @@ jobs:
       - name: Code coverage
         uses: codecov/codecov-action@v3
         with:
-          fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }}
           files: ./build/logs/clover.xml
+          fail_ci_if_error: true