ci: use | instead of / as separator for sed commands (#2705)

Author: gavinbarron

.github/workflows/pr-chat.yml

@@ -34,9 +34,9 @@ jobs:
         shell: bash
         run: |
           cp samples/react-contoso/.env.sample samples/react-contoso/.env
-          sed -i 's/REACT_APP_CLIENT_ID="00000000-0000-0000-0000-000000000000"/REACT_APP_CLIENT_ID="${{secrets.REACT_CONTOSO_CHAT}}"/g' samples/react-contoso/.env
-          sed -i 's/REACT_APP_BACKEND_CLIENT_ID="00000000-0000-0000-0000-000000000000"/REACT_APP_BACKEND_CLIENT_ID="${{secrets.REACT_CONTOSO_CHAT_BACKEND}}"/g' samples/react-contoso/.env
-          sed -i 's/REACT_APP_BASE_DIR="/"/REACT_APP_BASE_DIR="/next/mgt-chat""/g' samples/react-contoso/.env
+          sed -i 's|REACT_APP_CLIENT_ID="00000000-0000-0000-0000-000000000000"|REACT_APP_CLIENT_ID="${{secrets.REACT_CONTOSO_CHAT}}"|g' samples/react-contoso/.env
+          sed -i 's|REACT_APP_BACKEND_CLIENT_ID="00000000-0000-0000-0000-000000000000"|REACT_APP_BACKEND_CLIENT_ID="${{secrets.REACT_CONTOSO_CHAT_BACKEND}}"|g' samples/react-contoso/.env
+          sed -i 's|REACT_APP_BASE_DIR="/"|REACT_APP_BASE_DIR="/next/mgt-chat"|g' samples/react-contoso/.env
 
       - name: Build 🛠
         run: |