add codecov token (#51)

Author: vtjnash

.github/workflows/CI.yml

@@ -37,6 +37,7 @@ jobs:
       - uses: codecov/codecov-action@v5
         with:
           files: lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}
   docs:
     name: Documentation
     runs-on: ubuntu-latest