try adding rmarkdown as suggests

thijsjanzen · thijsjanzen · commit 1233ebae95a4 · 2025-07-07T12:17:32.000+02:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -48,3 +48,4 @@ Suggests:
     knitr,
     ggrepel,
     IRanges,
+    rmarkdown
