ci: use env variable

Author: gnikit

.github/workflows/main.yml

@@ -58,5 +58,6 @@ jobs:
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v4
         with:
-          token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}