ci: fix Codecov tokenless upload for public repo

Author: devblac

.github/workflows/ci.yml

@@ -46,7 +46,6 @@ jobs:
         with:
           files: coverage.out
           flags: unittests
-          fail_ci_if_error: true
-        env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
+          token: ""