Remove Coolify demo link (timeout) (#4010)

- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/3558
- `https://demo.coolify.io/ : HTTPSConnectionPool(host='demo.coolify.io', port=443): Max retries exceeded with url: / (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0x7efd0c418790>, 'Connection to demo.coolify.io timed out. (connect timeout=10)'))`

README.md

@@ -1816,7 +1816,7 @@ _Related: [Automation](#automation)_
 [Serverless computing - Wikipedia](https://en.wikipedia.org/wiki/Serverless_computing).
 
 - [Appwrite](https://appwrite.io) - End to end backend server for web, native, and mobile developers 🚀. ([Source Code](https://github.com/appwrite/appwrite)) `BSD-3-Clause` `PHP`
-- [Coolify](https://coolify.io/) - An open-source & self-hostable Heroku / Netlify alternative (and even more). ([Demo](https://demo.coolify.io/), [Source Code](https://github.com/coollabsio/coolify)) `Apache-2.0` `Docker`
+- [Coolify](https://coolify.io/) - An open-source & self-hostable Heroku / Netlify alternative (and even more). ([Source Code](https://github.com/coollabsio/coolify)) `Apache-2.0` `Docker`
 - [Dokku](https://dokku.com/) - An open source PAAS alternative to Heroku. ([Source Code](https://github.com/dokku/dokku)) `MIT` `Docker/Shell/Go`
 - [fx](https://github.com/metrue/fx) - A tool to help you do Function as a Service with painless on your own servers. `MIT` `Go`
 - [Kubero](https://www.kubero.dev/) - A self-hosted Heroku PaaS alternative for Kubernetes that implements GitOps. ([Demo](https://demo.kubero.dev/), [Source Code](https://github.com/kubero-dev/kubero)) `GPL-3.0` `K8S/Nodejs/Go`