fix: referential updates get 429 http responses #156
Description
The script updating the css referentials is getting randomly 429 http responses:
> php scripts/css-referential-scraper
Fetching CSS referentials...
PHP Fatal error: Uncaught GuzzleHttp\Exception\ClientException: Client error: `GET https://www.w3.org/Style/CSS/all-properties.en.json` resulted in a `429 Too Many Requests` response:
<!DOCTYPE html><html lang="en-US">
- Check how to limit the number of requests
- Implement retry strategy with to avoid failure when some http issues occurs