simplify pipeline

Author: Philipp Karlsson

.github/workflows/release-package.yml

@@ -30,11 +30,10 @@ jobs:
         run: npm run build
 
       - name: deploy Showcase to Github Pages
-        working-directory: ./showcase
         uses: JamesIves/[email protected]
         with:
           branch: docs
-          folder: build
+          folder: showcase/build
           single-commit: true
 #
 #  build-library: