README: add note regarding @latest

cknitt · cknitt · commit d3b1670dc51d · 2024-05-08T10:55:33.000+02:00
diff --git a/README.md b/README.md
@@ -3,7 +3,8 @@
 Quickly create new [ReScript](https://rescript-lang.org/) apps from project templates:
 
 ```sh
-npm create rescript-app
+# Note: `@latest` is important, otherwise npm may run an old version.
+npm create rescript-app@latest
 ```
 
 or
