fix(flox): Change demo link

According to their GitHub repo, the demo url is:
https://flox-demo.pyxl.dev/

Signed-off-by: Rodrigo Avelino <rodrigo@avelino.org>

README.md

@@ -992,7 +992,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
 - [CUPS](https://www.cups.org/) - The Common Unix Print System uses Internet Printing Protocol (IPP) to support printing to local and network printers. ([Source Code](https://github.com/apple/cups)) `GPL-2.0` `C`
 - [CyberChef](https://github.com/gchq/CyberChef) - Perform all manner of "cyber" operations within a web browser such as AES, DES and Blowfish encryption and decryption, creating hexdumps, calculating hashes, and much more. ([Demo](https://gchq.github.io/CyberChef)) `Apache-2.0` `JavaScript`
 - [DomainMOD](https://domainmod.org) - Application to manage your domains and other internet assets in a central location. DomainMOD includes a Data Warehouse framework that allows you to import your WHM/cPanel web server data so that you can view, export, and report on your data. ([Demo](https://demo.domainmod.org), [Source Code](https://github.com/domainmod/domainmod)) `GPL-3.0` `PHP`
-- [Flox](https://github.com/devfake/flox) `⚠` - Self hosted movie, TV series and anime watch list with a 3-point rating system. Uses The Movie Database backend for information. ([Demo](http://80.240.132.120/flox-demo/public/)) `MIT` `PHP`
+- [Flox](https://github.com/devfake/flox) `⚠` - Self hosted movie, TV series and anime watch list with a 3-point rating system. Uses The Movie Database backend for information. ([Demo](https://flox-demo.pyxl.dev/)) `MIT` `PHP`
 - [formspree](https://formspree.io/) `⚠` - Just send your form to our URL and we'll forward it to your email. No PHP, Javascript or sign up required. ([Demo](http://test.formspree.io/), [Source Code](https://github.com/formspree/formspree)) `AGPL-3.0` `Python`
 - [GeneWeb](https://geneweb.tuxfamily.org/wiki/GeneWeb) - GeneWeb is an open source genealogy software written in OCaml. It comes with a Web interface and can be used off-line or as a Web service. ([Demo](https://demo.geneweb.tuxfamily.org/gw7/), [Source Code](https://github.com/geneweb/geneweb)) `GPL-2.0` `OCAML`
 - [How Secure Is My Password](https://github.com/howsecureismypassword/hsimp) - Rather than just saying a password is "weak" or "strong", How Secure is My Password? lets your users know how long it would take someone to crack their password. ([Demo](https://howsecureismypassword.net/)) `MIT` `Javascript`