add missing generated files (#13609)

www/apps/book/app/learn/resources/contribution-guidelines/docs/page.mdx

@@ -159,6 +159,12 @@ The common task that `prep` does is generate the sidebar files, which is useful
 npm run prep
 ```
 
+In the `resources` project, you may need to run `prep:turbo --force` for tag changes:
+
+```bash npm2yarn title="www/apps/resources"
+npm run prep:turbo -- --force
+```
+
 ---
 
 ## Style Guide