Fix log upload in case of zombienet test failure (#646)

.github/workflow-templates/zombienet-tests/action.yml

@@ -49,7 +49,7 @@ runs:
       shell: bash
       run: |
         ls -ltr /tmp
-        latest_zombie_dir=$(find /tmp -type d -iname "*zombie*" -printf '%T@ %p\n' | sort -n | tail -1 | cut -f2- -d" ")
+        latest_zombie_dir=$(find /tmp -type d -iname "*zombie*" -printf '%T@ %p\n' 2>/dev/null | sort -n | tail -1 | cut -f2- -d" " || true)
         logs_dir="logs"
         mkdir -p "$logs_dir"
         find "$latest_zombie_dir" -type f -name "*.log" -exec cp {} "$logs_dir" \;