DO NOT MERGE - Test new preview GitHub action

[joepeeples]

Testing

[github-actions]

Documentation previews:

• ✨ HTML diff
• 📙 Elastic Security Guide

[github-actions]

A documentation preview will be available soon.
Help us out by validating the Buildkite preview and reporting issues here.

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• 📚 HTML diff: Buildkite - Jenkins
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• 🧪 Buildkite vs Jenkins diff

[mergify]

This pull request does not have a backport label. Could you fix it @joepeeples? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• v7.x is the label to automatically backport to the 7.x branch.
• v7./d./d is the label to automatically backport to the 7./d branch. /d is the digit

NOTE: backport-skip has been added to this pull request.

[joepeeples]

For testing only, no merge