chore: Clarify live editor vs Mermaid syntax issues in auto-close comment

Direct syntax error reports to mermaid-js/mermaid and limit this repo to live editor bugs.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/workflows/close-broken-link-issues.yml

@@ -27,15 +27,21 @@ jobs:
             const issueNumber = context.payload.issue.number;
             const newIssueUrl = `https://github.com/${owner}/${repo}/issues/new?assignees=&labels=bug&template=bug_report.md&title=Broken%20link`;
 
+            const mermaidIssuesUrl = 'https://github.com/mermaid-js/mermaid/issues/new';
+
             const commentBody = [
               `@${context.payload.issue.user.login} This issue was automatically closed because the title only contains "Broken link" without additional details.`,
               '',
-              'When reporting a broken link, please include:',
+              '**Please only open issues here if something is broken in the live editor itself** (e.g. a link fails to load, the editor UI misbehaves, or a feature of mermaid.live does not work).',
+              '',
+              '**Do not open issues here for syntax errors or invalid Mermaid diagram code.** Those belong in the main Mermaid repository: [mermaid-js/mermaid](https://github.com/mermaid-js/mermaid/issues/new).',
+              '',
+              'If you are reporting a live editor bug, please include:',
               '- The full URL that failed to load',
               '- What you expected to happen',
               '- Any error messages you saw',
               '',
-              `You can [open a new issue](${newIssueUrl}) with this information.`
+              `You can [open a new issue in this repo](${newIssueUrl}) with this information, or report diagram syntax issues in the [Mermaid repo](${mermaidIssuesUrl}).`
             ].join('\n');
 
             await github.rest.issues.createComment({