Use small xxxxs
@@ -57,7 +57,7 @@ To make a Zebra RFC:
1. Choose a short feature name like `my-feature`.
2. Copy the `book/src/dev/rfcs/0000-template.md` file to
-`book/src/dev/rfcs/drafts/XXXX-my-feature.md`.
+`book/src/dev/rfcs/drafts/xxxx-my-feature.md`.
3. Edit the template header to add the feature name and the date, but leave
the other fields blank for now.
