Fix: broken link to server .env.example (#3151)

Correct URL is https://github.com/twentyhq/twenty/blob/main/packages/twenty-server/.env.example

packages/twenty-docs/docs/start/self-hosting/self-hosting.mdx

@@ -11,7 +11,7 @@ Feel free to open issues on [GitHub](https://github.com/twentyhq/twenty/issues/n
 
 Prebuilt images for both front and back-end can be found on [docker hub](https://hub.docker.com/r/twentycrm/).
 
-For correct operation your will need to set [environment variables](enviroment-variables), a example configuration can be found [here](https://github.com/twentyhq/twenty/blob/main/server/.env.example).
+For correct operation your will need to set [environment variables](enviroment-variables), a example configuration can be found [here](https://github.com/twentyhq/twenty/blob/main/packages/twenty-server/.env.example).
 
 
 ## Render
@@ -29,4 +29,4 @@ A joint Docker image - containing both the frontend and server - that you can de
 ## Railway 
 [![Deploy on Railway](https://railway.app/button.svg)](https://railway.app/template/YWGqza?referralCode=3CLObs)
 
--->
+-->