[nodejs/node] Timezone updater broken

### ROOT CAUSE The issue is that the `icupkg` command is not found, which is required to update the timezone data. This suggests that the `icu-data` package, which contains the `icupkg` tool, is not installed on the `ubuntu-slim` runners. ### CODE FIX To resolve this issue, you need to ensure that the `icu-data` package is installed on the `ubuntu-slim` runners. You can do this by adding a step to the workflow to install the `icu-data` package. Here is the fix:

yaml
- name: Install ICU Data
  run: sudo apt-get update && sudo apt-get install -y libicu-dev


Add this step before the step that runs the `update-timezone.mjs` script. This will ensure that the `icu-data` package is installed and the `icupkg` tool is available on the runners.