GHA: use codecov token (#131)

Author: mathause

.github/workflows/ci.yaml

@@ -71,6 +71,8 @@ jobs:
 
     - name: Upload code coverage to Codecov
       uses: codecov/codecov-action@v4
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
       with:
           file: ./coverage.xml
           flags: unittests