Add checkout step to build workflow

.github/workflows/build.yml

@@ -45,6 +45,9 @@ jobs:
       fail-fast: false
 
     steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v5
+       
       - name: Free Disk Space
         if: true
         uses: endersonmenezes/free-disk-space@v3  # Use @main for latest, @v3 for stable