Fix OnlyOffice homepage

Change ONLYOFFICE homepage from http://www.OnlyOffice.org (which redirected to .com) to https://helpcenter.onlyoffice.com/faq/server-opensource.aspx.

README.md

@@ -973,7 +973,7 @@ See https://github.com/n1trux/awesome-sysadmin#monitoring and https://github.com
 - [EtherDraw](https://github.com/JohnMcLear/draw) - Intuitive collaborative drawing web based tool. `Apache-2.0` `Nodejs`
 - [Etherpad](http://etherpad.org/) - Etherpad is a highly customizable Open Source online editor providing collaborative editing in really real-time. ([Demo](https://demo.sandstorm.io/appdemo/h37dm17aa89yrd8zuqpdn36p6zntumtv08fjpu8a8zrte7q1cn60), [Source Code](https://github.com/ether/etherpad-lite)) `Apache-2.0` `Nodejs`
 - [Infinoted](https://github.com/gobby/gobby/wiki/Dedicated%20Server) - Server for [Gobby](https://github.com/gobby/gobby/wiki), a multi-platform collaborative text editor. ([Source Code](https://github.com/gobby/gobby)) `MIT` `C++`
-- [ONLYOFFICE](http://onlyoffice.org/) - Office suite that enables you to manage documents, projects, team and customer relations in one place. ([Source Code](https://github.com/ONLYOFFICE/DocumentServer)) `AGPL-3.0` `Nodejs`
+- [ONLYOFFICE](https://helpcenter.onlyoffice.com/faq/server-opensource.aspx) - Office suite that enables you to manage documents, projects, team and customer relations in one place. ([Source Code](https://github.com/ONLYOFFICE/DocumentServer)) `AGPL-3.0` `Nodejs`
 - [PHPOffice](https://github.com/PHPOffice) - PHPOffice contains libraries which permits to write and read files from most office suites. `LGPL-3.0` `PHP`
 - [WebODF](http://webodf.org/) - Tools and libraries to view and edit Open Document Format (ODF) files. ([Source Code](https://github.com/kogmbh/WebODF)) `AGPL-3.0` `HTML5`