[update] the installation section for react gantt

Author: mafanya23

data/web/react.md

@@ -31,9 +31,9 @@ Note that the trial React Gantt component is available for 30 days only.}}
 
 **Installing the PRO version of React Gantt component**
 
-{{note If you already own DHTMLX Gantt under a proprietary license, send your **license number** to ***[email protected]*** to receive login credentials for the private
-**npm** registry as well as a detailed guide on how to install the React Gantt component. Note that private **npm** access is available until your proprietary license expires.}}
-
+{{note
+You can access the DHTMLX private npm directly in the [Client's Area](https://dhtmlx.com/clients/) by generating your login and password for npm. A detailed installation guide is also available there. Please note that access to the private npm is available only while your proprietary Gantt license is active.
+}}
 
 Version Requirements
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