Storybook Deployment: Add wait-for-pages-deployment flag & add environment protection

Author: Ruslan Farkhutdinov

.github/workflows/pr-storybook-build.yml

@@ -27,6 +27,7 @@ jobs:
     name: Build preview artifacts
     runs-on: ubuntu-latest
     timeout-minutes: 20
+    environment: github-pages
 
     steps:
       - name: Decide action (deploy/remove/none)

.github/workflows/pr-storybook-deploy.yml

@@ -81,3 +81,4 @@ jobs:
           umbrella-dir: preview
           comment: false
           token: ${{ github.token }}
+          wait-for-pages-deployment: true