fix: add checkout code action in test job

Author: Rahul-4480

.github/workflows/terraform-checks.yaml

@@ -12,6 +12,9 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3
         with: