chocolatey: update description, add source code link/license/language

- ref. #416

README.md

@@ -151,7 +151,7 @@ Managing software on desktop computers.
 
 _See also: [IT Asset Management](#it-asset-management)_
 
-- [Chocolatey](https://chocolatey.org/) – Windows CLI package manager written in .NET/PS, based on NuGet.
+- [Chocolatey](https://chocolatey.org/) – The package manager for Windows. ([Source Code](https://github.com/chocolatey/choco)) `Apache-2.0` `C#/PowerShell`
 - [OCS Inventory NG](https://ocsinventory-ng.org/?lang=en) - Inventory, deployment and network scan. ([Source Code](https://github.com/OCSInventory-NG/OCSInventory-Server)) `GPL-2.0` `Perl/PHP`