Switch from 'yarn global' to 'npm -i' (#717)

Author: hishamhm

.github/workflows/playground.yml

@@ -33,7 +33,7 @@ jobs:
     - name: netlify deploy
       id: netlify-deploy
       run: |
-        yarn global add netlify-cli
+        npm i -g netlify-cli
         cd ${{ github.workspace }}/teal-playground
         NETLIFY_URL=$(netlify deploy --dir=dist --alias=${{ github.event.pull_request.number }} | grep -Eo '(http|https)://[a-zA-Z0-9./?=_-]*(--)[a-zA-Z0-9./?=_-]*')
         echo "$NETLIFY_URL"