Update npm-publish-github-packages.yml to upload release asset

.github/workflows/npm-publish-github-packages.yml

@@ -45,3 +45,14 @@ jobs:
         uses: actions/upload-artifact@v2.3.1
         with:
           path: fork-awesome.tgz
+      - name: Upload Release Asset
+        id: upload-release-asset 
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: github.event_name == 'release'
+        with:
+          upload_url: ${{ github.event.release.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
+          asset_path: ./fork-awesome.tgz
+          asset_name: fork-awesome.tgz
+          asset_content_type: application/tar+gzip