[chore] sort enums members in table

[trisch-me]

Fixes #1082

This PR add sort for enum attributes for both registry and external md files
@lmolkova FYI

Merge requirement checklist

• CONTRIBUTING.md guidelines followed.
• Change log entry added, according to the guidelines in When to add a changelog entry.
  • If your PR does not need a change log, start the PR title with [chore]
• schema-next.yaml updated with changes to existing conventions.

[lmolkova]

Thank you!