Update sitemaps.yml

[glenn-jocher]

copilot:all

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Update to the scheduling of Dependabot and enhancements to the sitemap submission process.

📊 Key Changes

• Dependabot update interval changed from daily to weekly.
• Improved the function submit_urls_to_indexnow in the sitemap.yml GitHub Action, including better use of environment variables and additional parameter in payload.

🎯 Purpose & Impact

• Reducing Dependabot update frequency: This change should lower the noise of frequent updates, making it easier for maintainers to manage dependencies.
• Sitemap submission enhancements: The updated IndexNow API usage will increase submission reliability and transparency. This might contribute to better SEO and up-to-date search engine indexing for users accessing the Ultralytics documentation. 🌐✨