Update main.yml

Author: Shreyaskr1409

.github/workflows/main.yml

@@ -82,7 +82,7 @@ jobs:
 
     steps:
       - name: Download build artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: build_artifact
           path: frontend/web/build/