fix: clarify that version in fern.config.json refers to fern cli (#92)

Author: devalog

fern/docs/pages/welcome.mdx

@@ -56,7 +56,7 @@ Open [http://localhost:3000](http://localhost:3000) to see your docs.
 
 <Step title="Make it yours">
 
-Update `fern.config.json` with your organization name and `docs.yml` with your desired URL:
+Update `fern.config.json` with your organization name and `docs.yml` with your desired URL. The `version` refers to [the Fern CLI](https://buildwithfern.com/learn/cli-api-reference/cli-reference/overview):
 
 ```json title="fern.config.json"
 {