👷 Fix the CI actions deprecation

Author: GiulioRomualdi

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: autogenerated_files
           path: robot_log_visualizer/ui/autogenerated