fix GLPI URL

thanks @notsag in kahun/awesome-sysadmin#537

README.md

@@ -365,7 +365,7 @@
 
 *IT Assets Management software.*
 
-* [GLPI](http://www.glpi-project.org/spip.php?lang=en) - Information Resource-Manager with an additional Administration Interface.
+* [GLPI](https://www.glpi-project.org/) - Information Resource-Manager with an additional Administration Interface.
 * [OCS Inventory NG](http://www.ocsinventory-ng.org/en/) - Enables users to inventory their IT assets.
 * [OPSI](http://www.opsi.org) - Hardware and software inventory, deployment, and patching for Linux and Windows.
 * [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.