Fix workflow

Author: Jayash Satolia

.github/workflows/tests.yml

@@ -52,7 +52,7 @@ jobs:
         run: make install
 
       - name: 'Upload Artifact'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: zbox-linux
           path: zbox