Update actions/checkout in deploy job

Author: kelvinqian00

.github/workflows/deploy.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps: 
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Setup CD Environment
       uses: yetanalytics/action-setup-env@v1