style-guide: clarify that any client may have --render (#5915)

contributing-guides/style-guide.md

@@ -34,10 +34,10 @@ tldrl -f {{page.md}}
 For other ways to use `tldrl`, such as linting an entire directory, check out (what else!)
 [`tldr tldrl`](https://github.com/tldr-pages/tldr/blob/main/pages/common/tldrl.md)
 
-If you're using the Node.js client of tldr-pages, you can preview a page locally using the `-f` flag (aka `--render`):
+Your client may be able to preview a page locally using the `--render` flag:
 
 ```
-tldr -f {{page.md}}
+tldr --render {{page.md}}
 ```
 
 ## Token syntax