NFS-1239: Readme link and copyright updated

Author: cornelius-behrend

README.MD

@@ -2,7 +2,7 @@
 
 # Staffbase Plugins SDK for Node.js.
 
-If you are developing your own plugin for your Staffbase app we describe the authentication flow of a plugin at https://developers.staffbase.com/api/plugin-sso/. While this documentation just covers the conceptual ideas of the interface of plugins though – the so called Plugin SSO – we want to provide a library to help you develop your first plugin for Staffbase even faster. This SDK provides the basic functionality to parse and verify a provided token for Node.js.
+If you are developing your own plugin for your Staffbase app we describe the authentication flow of a plugin at https://developers.staffbase.com/guide/customplugin-overview/. While this documentation just covers the conceptual ideas of the interface of plugins though – the so called Plugin SSO – we want to provide a library to help you develop your first plugin for Staffbase even faster. This SDK provides the basic functionality to parse and verify a provided token for Node.js.
 
 
 ## Installation
@@ -178,7 +178,7 @@ To run the tests a simple `# npm test` command in the root directory will suffic
 
 ## License
 
-Copyright 2017 Staffbase GmbH.
+Copyright 2017-2021 Staffbase GmbH.
 
 Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0