Fix main link + add demo

README.md

@@ -559,7 +559,7 @@ See https://github.com/n1trux/awesome-sysadmin#dns
 - [Mayan EDMS](http://www.mayan-edms.com) - Free Open Source Electronic Document Management System. An electronic vault for your documents with preview generation, OCR, and automatic categorization among other features. ([Source Code](https://gitlab.com/mayan-edms/mayan-edms)) `Apache-2.0` `Python`
 - [Paperless](https://github.com/danielquinn/paperless) - Scan, index, and archive all of your paper documents. `GPL-3.0` `Python`
 - [SANE Network Scanning](http://sane-project.org/) - Allow remote clients to access image acquisition devices (scanners) available on the local host. ([Source Code](http://www.sane-project.org/cvs.html)) `GPL-2.0` `C`
-- [Sismics Docs](https://github.com/sismics/docs) - Lightweight document management system packed with all the features you can expect from big expensive solutions. ([Source Code](https://github.com/sismics/docs)) `GPL-2.0` `Java`
+- [Sismics Docs](https://www.sismicsdocs.com/) - Lightweight document management system packed with all the features you can expect from big expensive solutions. ([Demo](https://www.sismicsdocs.com/#!/demo), [Source Code](https://github.com/sismics/docs)) `GPL-2.0` `Java`
 
 ## E-books and Integrated Library Systems (ILS)