codecov/codecov-action moved to v4 and added CODECOV_TOKEN

Author: jrzaurin

.github/workflows/build.yml

@@ -81,6 +81,7 @@ jobs:
         coverage report --fail-under=90
         coverage xml
     - name: upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: true