Remove NODE_AUTH_TOKEN for publish step

Author: microbit-grace

.github/workflows/build.yml

@@ -31,5 +31,3 @@ jobs:
           path: ./storybook-static
       - run: npm publish --allow-directory=all
         if: github.event_name == 'release' && github.event.action == 'created'
-        env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}