Update deploy.yml

Author: hshah-mitre

.github/workflows/deploy.yml

@@ -19,6 +19,8 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'pull_request'
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v3    
       - name: Print working directory and files
         run: |
           pwd