Use token for code cov

Author: cijothomas

.github/workflows/ci.yml

@@ -163,5 +163,7 @@ jobs:
         run: cargo llvm-cov --locked --all-features --workspace --lcov --output-path lcov.info
       - name: Upload to codecov.io
         uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
           fail_ci_if_error: true