1. Click on the Team Library icon within the Assets menu above the Layers Panel on the left (Or use Alt/Option + 3 to open the Team Library)
2. In the Current File section, click on Publish next to the file you'd like to publish:
3. Add Description of all the changes that you've made to the file:
4. Click to expand the Styles & Components section and view a list of all  Styles and  Components that will be included:
5. Click on Publish Changes to publish them to your Team Library.