[DOCS] 8.5 Release Notes

[benironside]

Resolves #2466 and resolves #2429 by creating release notes for 8.5. By the way, would anyone object to our not including the "Breaking changes" or "Known issues" headers when they are empty?

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[github-actions]

Documentation previews:

• ✨ HTML diff
• 📙 Elastic Security Guide

[mergify]

This pull request is now in conflicts. Could you fix it @benironside? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b issue-2460-big upstream/issue-2460-big
git merge upstream/main
git push upstream issue-2460-big

[nastasha-solomon]

Thanks for setting this up @benironside! It looks like we have some breaking changes to doc in https://github.com/elastic/security-team/issues/4898. The known issue section we can probably omit for now since we haven't been contacted about any yet.

[approksiu]

Hi all, we've added tag has_guide to all the prebuilt detection rules that have Investigation guides (elastic/detection-rules#2297) - please make a note in the release notes if not yet done. Thanks a lot!

[nastasha-solomon]

@approksiu thanks for reaching out! Does the change you described affect user's experience when interacting with investigation guides? If it does, would you mind describing whats changed and specifying if the change falls under the category of a new feature, new enhancement, breaking change, or bug fix?

[approksiu]

@nastasha-solomon It is an enhancement, it does not affect interaction with the guides, but enhances interaction with the rules from user perspective. They now can filter out just the rule that have the guides (by selecting has_guide tag) - for example if they want to look for an example of a guide, or want to enable the relevant rule that has a guide provided already.

[nastasha-solomon]

Makes sense, thank you! One more question: at the end of the release note summary for this enhancement, did you want us to link to a specific (and public) PR or issue? If not, we can just omit it. :)

[approksiu]

Thanks @nastasha-solomon ! elastic/detection-rules#2297 - this issue can be linked. Thanks!

[joepeeples]

Looking good, added some line edits.

I also have a few features I've documented that I need to add to the RNs -- I'll add those in another comment, don't want to lose the existing edits

[jmikell821]

All slight nits/suggestions. Thanks for pulling it together!

[joepeeples]

Found a few tiny tiny nit details, otherwise LGTM!