doc: v6 change log fix
Checklist
-
documentation is changed or added
Affected core subsystem(s)
doc
Description of change
backport of https://github.com/nodejs/node/commit/cc5d9767af69c453dbb27d2fa09d8f2e8913774d and https://github.com/nodejs/node/commit/b8f035b07c0a9cc0e916a8fe84055bc831b64ee6
/cc @TheAlphaNerd