Add Codecov token to CI workflow

This change includes the Codecov token in the GitHub Actions workflow for uploading coverage reports. This ensures that the coverage data is securely transmitted to Codecov, enabling better tracking of code coverage over time.

Author: raythurman2386

.github/workflows/tests.yml

@@ -62,5 +62,6 @@ jobs:
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v3
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.xml
         fail_ci_if_error: true