update in template

Author: sentrivana

scripts/split_tox_gh_actions/templates/test_group.jinja

@@ -92,7 +92,7 @@
 
       - name: Upload coverage to Codecov
         if: {% raw %}${{ !cancelled() }}{% endraw %}
-        uses: codecov/codecov-action@v5.1.2
+        uses: codecov/codecov-action@v5.3.1
         with:
           token: {% raw %}${{ secrets.CODECOV_TOKEN }}{% endraw %}
           files: coverage.xml