Add missing codecov token to CI

Author: codingjoe

.github/workflows/ci.yml

@@ -65,3 +65,5 @@ jobs:
       - run: python -m pip install -e .[${{ matrix.extras }}]
       - run: python -m pytest
       - uses: codecov/codecov-action@v5
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}