8.16.0 Release notes

[nastasha-solomon]

Description

Generate the 8.16.0 release notes and publish them before or on the release day.

To-do

• Draft the release notes
• Add the release notes PR the docs release issue
• Known issues:
  • Carry forward known issues that haven't been fixed yet
  • Update the summaries of known issues that were "fixed" in the current release (add fix details)
• Merge the Security release notes PR

Notes

• New features/enhancements that are outside of the security-docs repo and need release notes: none
• Known issues to doc:
  • Manual rule runs: [Request] Documentation for Manual Run of Security rules #5264 (comment)
• Follow up on these items: none