Prerequisites

• I have searched existing issues to ensure this feature hasn't already been requested
• I have tested using the latest version of docs-builder

What problem are you trying to solve?

The changelog directive currently generates empty sections when there is no content. For example, in https://www.elastic.co/docs/release-notes/cloud-hosted/known-issues

This gets quite noisy for products that have a lot of releases (e.g. in Cloud Serverless tests like elastic/docs-content#6599)

Proposed Solution

Ideally the directive should only generate output if there are relevant entries.
If necessary, we could make this configurable with a new option (akin to the :dropdowns: and :subsections: options).

Examples and Research

No response

Alternative Solutions

No response

Additional Context

No response

How important is this feature to you?

Nice to have