Changed the link of Modern Paste

The application is no longer available on  `www.modernpaste.com` and redirect to some ads.

README.md

@@ -1040,7 +1040,7 @@ See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com
 - [Fugacious](https://fugacio.us) - Open source short-term secure messaging (OSSSM). ([Source Code](https://github.com/fugacious/fugacious)) `CC0-1.0` `Ruby`
 - [GIST](https://gitnet.fr/deblan/gist) - GIST is an open-source application to share code. ([Demo](https://gist.deblan.org/)) `GPL-3.0` `PHP`
 - [hastebin](http://hastebin.com/about.md) - Open source pastebin written in node.js. ([Demo](http://hastebin.com/), [Source Code](https://github.com/seejohnrun/haste-server)) `MIT` `Nodejs`
-- [Modern Paste](https://www.modernpaste.com) - Modern pastebin with a contemporary, minimalistic user interface backed by a robust feature set. ([Source Code](https://github.com/LINKIWI/modern-paste)) `MIT` `Python`
+- [Modern Paste](https://github.com/LINKIWI/modern-paste) - Modern pastebin with a contemporary, minimalistic user interface backed by a robust feature set. ([Source Code](https://github.com/LINKIWI/modern-paste)) `MIT` `Python`
 - [mojopaste](http://search.cpan.org/dist/App-mojopaste/) - Perl based pastebin. ([Demo](http://p.thorsen.pm/), [Source Code](https://github.com/jhthorsen/app-mojopaste)) `Artistic-2.0` `Perl`
 - [NoteHub](https://github.com/chmllr/NoteHub) - Free and Hassle-free Pastebin for Markdown Pages. Simple, clean, password provided, generated-short link. `MIT` `Nodejs`
 - [Paste](https://phpaste.sourceforge.io/) - Paste is forked from the original source pastebin.com used before it was bought. ([Source Code](https://github.com/jordansamuel/PASTE)) `GPL-3.0` `PHP`