Update links.yml to --scheme https

[glenn-jocher]

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🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced security protocols for link checks in GitHub workflows.

📊 Key Changes

• Enforced HTTPS usage by adding --scheme 'https' and --require-https flags to lychee link check commands.
• Modified the wget command options to properly quote the pattern when rejecting file types during downloading, to avoid potential shell globbing.

🎯 Purpose & Impact

• Purpose: To ensure that link validations are performed over secure connections, increasing the overall security of the automated checks.
• Impact: Could potentially flag links not using HTTPS, which contributes to a safer browsing experience and adherence to best practices for users. May also prevent any errors or unintended behavior due to unquoted pattern strings in the wget command.