Update linx-server entry

Updated the name, description and demo URL

README.md

@@ -750,7 +750,7 @@ See https://github.com/n1trux/awesome-sysadmin#distributed-filesystems
 - [imgpush](https://github.com/hauxir/imgpush) - imgpush is a self-hosted file upload service that can easily be integrated into other webapps. `MIT` `Python`
 - [ipfs.pics](https://github.com/ipfspics/server) - ipfs.pics is a distributed image hosting website. `AGPL-3.0` `PHP`
 - [Jirafeau](https://gitlab.com/mojo42/Jirafeau) - Jirafeau is a web site permitting to upload a file in a simple way and give an unique link to it. ([Demo](http://jirafeau.net/)) `AGPL-3.0` `PHP`
-- [linx](https://github.com/andreimarcu/linx-server) - File sharing application and pastebin with API, auto-expiry, deletion keys, and web seed support. ([Demo](https://linx.li/)) `GPL-3.0` `Go`
+- [linx-server](https://github.com/andreimarcu/linx-server) - Simple file sharing and pastebin with API, auto-expiry, deletion keys, and web seed support. ([Demo](https://demo.linx-server.net/)) `GPL-3.0` `Go`
 - [lufi](https://git.framasoft.org/luc/lufi) - Let's Upload that FIle, client-side encrypted. ([Demo](https://demo.lufi.io), [Source Code](https://git.framasoft.org/luc/lufi/tree/master)) `AGPL-3.0` `Perl`
 - [lutim](https://github.com/ldidry/lutim) - Let's Upload That Image. `AGPL-3.0` `Perl`
 - [OnionShare](https://github.com/micahflee/onionshare) - Securely and anonymously share a file of any size. `GPL-2.0` `Python`