For self-hosters or those like me providing hosting services for customers, here’s a simple grep which will list if any of the new bundled plugins are already in your containers/app.yml
grep -E 'git clone .*(discourse-(adplugin|affiliate|ai|apple-auth|assign|calendar|chat-integration|data-explorer|gamification|github|graphviz|hcaptcha|login-with-amazon|lti|math|microsoft-auth|oauth2-basic|openid-connect|patreon|policy|post-voting|reactions|rss-polling|solved|subscriptions|templates|topic-voting|user-notes|zendesk-plugin|cakeday))' containers/app.yml
Needs to run as root, from /var/discourse, and will output any lines that need to be manually removed from the plugins section of the app.yml before you rebuild.