docs: add applies to to PDF doc

yufeih · yufeih · commit 6868f6633d50 · 2023-11-02T22:20:44.000+08:00
diff --git a/docs/docs/pdf.md b/docs/docs/pdf.md
@@ -2,6 +2,9 @@
 
 Docfx can build PDF files from articles and API documentations.
 
+> [!NOTE]
+> This article applies to docfx 2.73.0 or greater
+
 ## Enable PDF
 
 To enable PDF for the whole site:
