fix: align CHANGELOG and publish script with v6.0.0#279

so-kaushal with Copilot wants to merge 2 commits into

pythons/angular-21-upgradescheduleonce/knowledgeowl-angular:pythons/angular-21-upgradefrom

copilot/sub-pr-278scheduleonce/knowledgeowl-angular:copilot/sub-pr-278Copy head branch name to clipboard