check-issue-refs: blanket-ban tracker tags in markdown too, no exceptions

docs/integrations/forge.md

@@ -215,7 +215,7 @@ pipeline steps in order:
    `CommonMark` ATX heading (1-6 leading `#`s followed by a space,
    tab, or end-of-line), prepend `\` so the embedded body doesn't
    blow into a top-level h1/h2 inside the wrapper message when the
-   dashboard renders it. Lines like `#tag`, `#123`, `#!/bin/bash`
+   dashboard renders it. Lines like `#tag`, `#123`, `#!/bin/bash` <!-- lint:allow: syntax examples, not real tags -->
    **aren't** headings — no escape, no cosmetic noise. Indented
    "headings" inside lists / nested quotes keep their leading
    whitespace.