Fix CumulusClips demo link

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

README.md

@@ -1162,7 +1162,7 @@ See also _[Monitoring](#monitoring)_
 
 - [Chevereto Free](https://chevereto.com/free) - Powerful and fast image hosting script that allows you to create your very own full featured image hosting website in just minutes. ([Source Code](https://github.com/Chevereto/Chevereto-Free)) `AGPL-3.0` `PHP`
 - [Coppermine](http://coppermine-gallery.net/) - Multilingual photo gallery that integrates with various bulletin boards. Includes upload approval and password protected albums. ([Demo](http://coppermine-gallery.net/demo/cpg15x/), [Source Code](https://github.com/coppermine-gallery/cpg1.6.x)) `GPL-3.0` `PHP`
-- [CumulusClips](http://cumulusclips.org/) - Your own video sharing website with CumulusClips video sharing script. You can build a YouTube clone where users can upload, rate, comment on videos, and much more. ([Demo](https://tube.devosi.org/)) `GPL-2.0` `PHP`
+- [CumulusClips](http://cumulusclips.org/) - Your own video sharing website with CumulusClips video sharing script. You can build a YouTube clone where users can upload, rate, comment on videos, and much more. ([Demo](http://demo.cumulusclips.org/)) `GPL-2.0` `PHP`
 - [Gallery CSS](https://benschwarz.github.io/gallery-css/) - Gallery.css is all CSS. Think: Simple, maintainable and understandable galleries without the use of Javascript. ([Source Code](https://github.com/benschwarz/gallery-css)) `MIT` `CSS`
 - [Lychee](https://lycheeorg.github.io/) - Open source grid and album based photo-management-system. ([Source Code](https://github.com/LycheeOrg/Lychee)) `MIT` `PHP`
 - [MediaDrop](https://mediadrop.video/) - Video, audio and podcast publication platform. ([Source Code](https://github.com/mediadrop/mediadrop)) `GPL-3.0` `Python`