ci: don't attempt to deploy Storybook in pull requests

Author: ilyvion

.github/workflows/CI.yml

@@ -44,6 +44,7 @@ jobs:
                   "npx wait-on http://127.0.0.1:6006/ && npm run test-storybook"
 
             - name: Deploy Storybook
+              if: github.event_name != 'pull_request'
               uses: JamesIves/github-pages-deploy-action@v4
               with:
                   folder: storybook-static